{"id":37155,"date":"2019-10-31T22:16:03","date_gmt":"2019-10-31T19:16:03","guid":{"rendered":"https:\/\/prohoster.info\/blog\/novaya-statya-testirovanie-zhestkih-diskov-obemom-14-16-tbajt-ne-tolko-bolshe-no-i-luchshe\/"},"modified":"2019-10-31T22:16:03","modified_gmt":"2019-10-31T19:16:03","slug":"novaya-statya-testirovanie-zhestkih-diskov-obemom-14-16-tbajt-ne-tolko-bolshe-no-i-luchshe","status":"publish","type":"post","link":"https:\/\/prohoster.info\/ro\/blog\/news\/novaya-statya-testirovanie-zhestkih-diskov-obemom-14-16-tbajt-ne-tolko-bolshe-no-i-luchshe","title":{"rendered":"Articol nou: Testarea hard disk-urilor de 14\u201316 TB: nu doar mai mult, ci \u0219i mai bine","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p>Capacitatea hard disk-urilor continu\u0103 s\u0103 creasc\u0103, dar ritmurile de cre\u0219tere au sc\u0103zut constant \u00een ultimii ani. Astfel, pentru a lansa primul unitate de 4 TB dup\u0103 ce au ap\u0103rut HDD-urile de 2 TB, industria a avut nevoie de doar doi ani, iar pentru a atinge marca de 8 TB au fost necesari trei, iar dublarea capacit\u0103\u021bii hard disk-ului de 3,5 inci a reu\u0219it abia dup\u0103 cinci ani.<\/p>\n<p>Ultimul salt a fost realizat gr\u00e2ce \u00e0 o \u00eentreag\u0103 list\u0103 de solu\u021bii inovatoare. Ast\u0103zi, chiar \u0219i cei mai conservatori, precum Toshiba, care p\u00e2n\u0103 \u00een ultima clip\u0103 s-au opus utiliz\u0103rii heliului, sunt nevoi\u021bi s\u0103 produc\u0103 hard disk-uri \u00een carcase etan\u0219e, iar num\u0103rul pl\u0103cilor de pe axul principal a crescut la nou\u0103, de\u0219i odat\u0103 cinci pl\u0103ci erau considerate un maxim rezonabil. \u00cen ni\u0219e specifice se aplic\u0103 tehnologia cunoscut\u0103 sub numele de \u00eenregistrare tip \u021bigl\u0103 (SMR, Shingled Magnetic Recording), \u00een care pistele sectoarelor de pe plac\u0103 se suprapun par\u021bial. \u0218i, \u00een cele din urm\u0103, pentru a muta limita capacit\u0103\u021bii hard disk-ului de la 14 la 16 TB f\u0103r\u0103 a utiliza SMR, produc\u0103torii au fost obliga\u021bi s\u0103 implementeze una dintre tehnologiile de perspectiv\u0103, lista c\u0103ror op\u021biuni se mic\u0219oreaz\u0103 treptat, pe care o reproducem anual.&nbsp;<noindex><a rel=\"nofollow\" href=\"https:\/\/3dnews.ru\/980108\" style=\"font-size: 10pt;\">finale<\/a><\/noindex>, \u2014 citirea pistei cu mai multe capete simultan (TDMR, Two-Dimensional Magnetic Recording). Mi\u0219carea ulterioar\u0103 va necesita, mai devreme sau mai t\u00e2rziu, \u0219i modific\u0103ri mai ample \u00een principiile de func\u021bionare ale HDD-urilor \u2014 cum ar fi \u00eenc\u0103lzirea pl\u0103cii prin laser sau microunde (HAMR\/MAMR, Heat\/Microwave-Assisted Magnetic Recording) \u00een momentul \u00een care capul de scriere trece.<\/p>\n<p>Cu toate acestea, este u\u0219or de observat c\u0103 toate tehnicile descrise sunt \u00een principal orientate spre cre\u0219terea densit\u0103\u021bii de scriere \u0219i a volumului pe un singur spindle, de\u0219i multe dintre acestea au un efect secundar benefic sub forma cre\u0219terii vitezei de citire \u0219i scriere liniar\u0103 a datelor. Din acest punct de vedere, HDD-urile moderne au dep\u0103\u0219it 250 MB\/s \u0219i sunt deja comparabile cu primele SSD-uri pentru consumatori. \u00cens\u0103 viteza de acces la sectoare aleatorii ale hard disk-urilor magnetice aproape c\u0103 nu progreseaz\u0103, iar \u00een termen de volum, num\u0103rul de opera\u021biuni pe secund\u0103 devine doar mai mic. \u00cen acela\u0219i timp, cresc cerin\u021bele de fiabilitate, deoarece cu c\u00e2t sunt stocate mai multe date pe un singur spindle, cu at\u00e2t este mai important s\u0103 nu le pierdem \u0219i cu at\u00e2t mai mult dureaz\u0103 recuperarea.<\/p>\n<p><img decoding=\"async\" alt=\"Articol nou: Testarea hard disk-urilor de 14\u201316 TB: nu doar mai mult, ci \u0219i mai bine\" src=\"\/wp-content\/uploads\/2019\/08\/1561a4ed51dd70a69ef3eb4f743fe578.png\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>\u00cens\u0103 \u0219i la aceast\u0103 provocare, creatorii de medii magnetice au g\u0103sit un r\u0103spuns. Am luat trei hard disk-uri cu capacitate \u00eentre 14 \u0219i 16 TB pentru a observa cum se adapteaz\u0103 tehnologiile de 64 de ani \u00een realit\u0103\u021bile anului 2019 \u0219i am remarcat c\u00e2teva tendin\u021be. Modelele de v\u00e2rf ale hard disk-urilor moderne de 3,5 inch, produse pentru servere de tip rack \u0219i SCSI, au multe \u00een comun cu unit\u0103\u021bile SSD \u2014 de la principiile de adresare a sectoarelor p\u00e2n\u0103 la integrarea direct\u0103 a circuitelor flash \u00een stiva local\u0103 de memorie. Modelele de consum, la r\u00e2ndul lor, au devenit mai apropiate din punct de vedere al caracteristicilor de cele server, iar descrierea \u201eHDD desktop\u201d nu mai transmite at\u00e2t de mult despre viteza \u0219i fiabilitatea dispozitivului. \u00cens\u0103 scopul acestui review nu se rezum\u0103 la cuvinte generale. Inten\u021bion\u0103m s\u0103 afl\u0103m cum noile tendin\u021be \u00een construc\u021bia hard disk-urilor se traduc \u00een valori concrete de m\u0103surare a performan\u021bei.<\/p>\n<h2><noindex><a rel=\"nofollow\" href=\"#contents\" class=\"right paragraph tooltip\" data-tooltip=\"\u0412\u0435\u0440\u043d\u0443\u0442\u044c\u0441\u044f \u043a \u043e\u0433\u043b\u0430\u0432\u043b\u0435\u043d\u0438\u044e\">\ud83d\udd3d<\/a><\/noindex><noindex><a rel=\"nofollow\" name=\"\u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0438 \u0443\u0447\u0430\u0441\u0442\u043d\u0438\u043a\u043e\u0432 \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f\" href=\"#\u0422\u0435\u0445\u043d\u0438\u0447\u0435\u0441\u043a\u0438\u0435 \u0445\u0430\u0440\u0430\u043a\u0442\u0435\u0440\u0438\u0441\u0442\u0438\u043a\u0438 \u0443\u0447\u0430\u0441\u0442\u043d\u0438\u043a\u043e\u0432 \u0442\u0435\u0441\u0442\u0438\u0440\u043e\u0432\u0430\u043d\u0438\u044f\" class=\"right paragraph tooltip\" data-tooltip=\"\u0421\u0441\u044b\u043b\u043a\u0430 \u043d\u0430 \u044d\u0442\u0443 \u0433\u043b\u0430\u0432\u0443\">#<\/a><\/noindex><strong>Specifica\u021biile tehnice ale participan\u021bilor la testare<\/strong><\/h2>\n<p>\u00cenainte de a \u00eencepe analiza rezultatelor testelor, merit\u0103 s\u0103 examin\u0103m cu aten\u021bie specifica\u021biile dispozitivelor cu care vom lucra. De data aceasta, num\u0103rul lor nu este at\u00e2t de mare ca la test\u0103rile noastre de grup obi\u0219nuite, dar am \u00eendeplinit condi\u021biile principale, f\u0103r\u0103 de care compararea hard disk-urilor nu poate pretinde a fi complet\u0103. \u00cen recenzie au fost incluse produse de la to\u021bi cei trei produc\u0103tori - Seagate, Toshiba \u0219i Western Digital, care apar\u021bin diferitelor categorii: de consum \u0219i server. Principalele caracteristici care le uniteaz\u0103 sunt - capacitatea de 14 sau 16 TByte, un corp etan umplut cu heliu \u0219i o vitez\u0103 de rota\u021bie a axului de 7200 rpm. Pentru compararea cu greii din testare, particip\u0103 trei dispozitive deja cunoscute de noi, cu capacit\u0103\u021bi mai mici (10 \u0219i 12 TByte), destinate utiliz\u0103rii \u00een servere, NAS-uri de acas\u0103 sau de birou.<\/p>\n<table class=\"neat\">\n<tbody>\n<tr>\n<th class=\"light strong\" style=\"text-align: left; vertical-align: top;\">Produc\u0103tor<\/th>\n<th class=\"light strong\" colspan=\"3\" style=\"text-align: center; vertical-align: top;\">Seagate<\/th>\n<th class=\"light strong\" colspan=\"2\" style=\"text-align: center; vertical-align: top;\">Toshiba<\/th>\n<th class=\"light strong\" style=\"text-align: right; vertical-align: top;\">Western Digital<\/th>\n<\/tr>\n<tr>\n<td class=\"light strong\" style=\"text-align: left; vertical-align: top;\">Seria<\/td>\n<td class=\"light strong\" style=\"text-align: right; vertical-align: top;\">BarraCuda Pro<\/td>\n<td class=\"light strong\" style=\"text-align: right; vertical-align: top;\">Exos X10<\/td>\n<td class=\"light strong\" style=\"text-align: right; vertical-align: top;\">IronWolf<\/td>\n<td class=\"light strong\" style=\"text-align: right; vertical-align: top;\">MG08<\/td>\n<td class=\"light strong\" style=\"text-align: right; vertical-align: top;\">S300<\/td>\n<td class=\"light strong\" style=\"text-align: right; vertical-align: top;\">Ultrastar DC HC530<\/td>\n<\/tr>\n<tr>\n<td class=\"light strong\" style=\"text-align: left; vertical-align: top;\">Num\u0103r de model<\/td>\n<td class=\"light\" style=\"text-align: right; vertical-align: top;\">ST14000DM001<\/td>\n<td class=\"light\" style=\"text-align: right; vertical-align: top;\">ST10000NM0016<\/td>\n<td class=\"light\" style=\"text-align: right; vertical-align: top;\">ST12000VN0008<\/td>\n<td class=\"light\" style=\"text-align: right; vertical-align: top;\">MG08ACA16TE<\/td>\n<td class=\"light\" style=\"text-align: right; vertical-align: top;\">HDWT31AUZSVA<\/td>\n<td class=\"light\" style=\"text-align: right; vertical-align: top;\">WUH721414ALE6L4<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Factor de form\u0103<\/td>\n<td style=\"text-align: right; vertical-align: top;\">3,5 inci<\/td>\n<td style=\"text-align: right; vertical-align: top;\">3,5 inci<\/td>\n<td style=\"text-align: right; vertical-align: top;\">3,5 inci<\/td>\n<td style=\"text-align: right; vertical-align: top;\">3,5 inci<\/td>\n<td style=\"text-align: right; vertical-align: top;\">3,5 inci<\/td>\n<td style=\"text-align: right; vertical-align: top;\">3,5 inci<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Interfa\u021ba<\/td>\n<td style=\"text-align: right; vertical-align: top;\">SATA 6 Gb\/s<\/td>\n<td style=\"text-align: right; vertical-align: top;\">SATA 6 Gb\/s<\/td>\n<td style=\"text-align: right; vertical-align: top;\">SATA 6 Gb\/s<\/td>\n<td style=\"text-align: right; vertical-align: top;\">SATA 6 Gb\/s<\/td>\n<td style=\"text-align: right; vertical-align: top;\">SATA 6 Gb\/s<\/td>\n<td style=\"text-align: right; vertical-align: top;\">SATA 6 Gb\/s<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Capacitate, GB<\/td>\n<td style=\"text-align: right; vertical-align: top;\">14 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">10 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">12 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">16 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">10 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">14 000<\/td>\n<\/tr>\n<tr>\n<td colspan=\"7\" style=\"text-align: left; vertical-align: top;\">Configura\u021bie<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Viteza de rota\u021bie a axului, rpm<\/td>\n<td style=\"text-align: right; vertical-align: top;\">7 200<\/td>\n<td style=\"text-align: right; vertical-align: middle;\">7 200<\/td>\n<td style=\"text-align: right; vertical-align: top;\">7 200<\/td>\n<td style=\"text-align: right; vertical-align: top;\">7 200<\/td>\n<td style=\"text-align: right; vertical-align: top;\">7 200<\/td>\n<td style=\"text-align: right; vertical-align: top;\">7 200<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Densitate util\u0103 de \u00eenregistrare a datelor, GB\/plac\u0103<\/td>\n<td style=\"text-align: right; vertical-align: top;\">1 750<\/td>\n<td style=\"text-align: right; vertical-align: middle;\">1 429<\/td>\n<td style=\"text-align: right; vertical-align: top;\">1 500<\/td>\n<td style=\"text-align: right; vertical-align: top;\">1 778<\/td>\n<td style=\"text-align: right; vertical-align: top;\">1 429<\/td>\n<td style=\"text-align: right; vertical-align: top;\">1 750<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Num\u0103rul de pl\u0103ci\/capete<\/td>\n<td style=\"text-align: right; vertical-align: top;\">8\/16<\/td>\n<td style=\"text-align: right; vertical-align: middle;\">7\/14<\/td>\n<td style=\"text-align: right; vertical-align: top;\">8\/16<\/td>\n<td style=\"text-align: right; vertical-align: middle;\">9\/18<\/td>\n<td style=\"text-align: right; vertical-align: middle;\">7\/14<\/td>\n<td style=\"text-align: right; vertical-align: top;\">8\/16<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Dimensiunea sectorului, byte<\/td>\n<td style=\"text-align: right; vertical-align: top;\">4096 (emulare 512 byte)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">4096 (emulare 512 byte)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">4096 (emulare 512 byte)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">4096 (emulare 512 byte)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">4096 (emulare 512 byte)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">4096 (emulare 512 byte)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Volumul buffer-ului, MB<\/td>\n<td style=\"text-align: right; vertical-align: top;\">256<\/td>\n<td style=\"text-align: right; vertical-align: top;\">256<\/td>\n<td style=\"text-align: right; vertical-align: top;\">256<\/td>\n<td style=\"text-align: right; vertical-align: top;\">512<\/td>\n<td style=\"text-align: right; vertical-align: top;\">256<\/td>\n<td style=\"text-align: right; vertical-align: top;\">512<\/td>\n<\/tr>\n<tr>\n<td colspan=\"7\" style=\"text-align: left; vertical-align: top;\">Performan\u021b\u0103<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Max. vitez\u0103 stabil\u0103 de citire secven\u021bial\u0103, MByte\/s<\/td>\n<td style=\"text-align: right; vertical-align: top;\">250<\/td>\n<td style=\"text-align: right; vertical-align: top;\">249<\/td>\n<td style=\"text-align: right; vertical-align: top;\">210<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">248<\/td>\n<td style=\"text-align: right; vertical-align: top;\">267<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Max. vitez\u0103 stabil\u0103 de scriere secven\u021bial\u0103, MByte\/s<\/td>\n<td style=\"text-align: right; vertical-align: top;\">250<\/td>\n<td style=\"text-align: right; vertical-align: top;\">249<\/td>\n<td style=\"text-align: right; vertical-align: top;\">210<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">248<\/td>\n<td style=\"text-align: right; vertical-align: top;\">267<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Timp mediu de c\u0103utare: citire\/scriere, ms<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">7,5\/ND<\/td>\n<\/tr>\n<tr>\n<td colspan=\"7\" style=\"text-align: left; vertical-align: top;\">Redundan\u021b\u0103<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">C\u0103rcare estimat\u0103, TB\/g<\/td>\n<td style=\"text-align: right; vertical-align: top;\">300<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">180<\/td>\n<td style=\"text-align: right; vertical-align: top;\">550<\/td>\n<td style=\"text-align: right; vertical-align: top;\">180<\/td>\n<td style=\"text-align: right; vertical-align: top;\">550<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Erori de citire ireparabile, num\u0103rul de cazuri la volumul de date (bi\u021bi)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">1\/10^15<\/td>\n<td style=\"text-align: right; vertical-align: top;\">1\/10^15<\/td>\n<td style=\"text-align: right; vertical-align: top;\">1\/10^15<\/td>\n<td style=\"text-align: right; vertical-align: top;\">10\/10^16<\/td>\n<td style=\"text-align: right; vertical-align: top;\">10\/10^14<\/td>\n<td style=\"text-align: right; vertical-align: top;\">1\/10^15<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">MTBF (timp mediu \u00eentre defect\u0103ri), h<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">2 500 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">1 000 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">2 500 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">1 000 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">2 500 000<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">AFR (probabilitatea de defectare \u00eentr-un an), %<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: middle;\">0,35<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">0,35<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Num\u0103rul de cicluri de parcare a capetelor<\/td>\n<td style=\"text-align: right; vertical-align: top;\">300 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">600 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">600 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">600 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">600 000<\/td>\n<td style=\"text-align: right; vertical-align: top;\">600 000<\/td>\n<\/tr>\n<tr>\n<td colspan=\"7\" style=\"text-align: left; vertical-align: top;\">Caracteristici fizice<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Puterea consumat\u0103: inactivitate\/citire-scriere, W<\/td>\n<td style=\"text-align: right; vertical-align: top;\">4,9\/6,9<\/td>\n<td style=\"text-align: right; vertical-align: top;\">4,5\/8,4<\/td>\n<td style=\"text-align: right; vertical-align: top;\">5,0\/7,8<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">7,15\/9,48<\/td>\n<td style=\"text-align: right; vertical-align: top;\">5,5\/6,0<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Nivelul de zgomot: inactivitate\/c\u0103utare, dB<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">1,8\/2,8<\/td>\n<td style=\"text-align: right; vertical-align: top;\">2,0\/ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">3,4\/ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">2,0\/3,6<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Temperatura maxim\u0103, \u00b0C: disc activ\/disc inactiv<\/td>\n<td style=\"text-align: right; vertical-align: middle;\">60\/70<\/td>\n<td style=\"text-align: right; vertical-align: middle;\">60\/ND<\/td>\n<td style=\"text-align: right; vertical-align: middle;\">70\/70<\/td>\n<td style=\"text-align: right; vertical-align: middle;\">55\/70<\/td>\n<td style=\"text-align: right; vertical-align: middle;\">70\/70<\/td>\n<td style=\"text-align: right; vertical-align: middle;\">60\/70<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Rezisten\u021ba la \u0219ocuri: disc pornit\/disc oprit<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">40 g (2 ms)\/250 g (2 ms)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">70 g (2 ms)\/250 g (2 ms)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">70 g (2 ms)\/250 g (2 ms)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">70 g (2 ms)\/250 g (2 ms)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">70 g (2 ms)\/300 g (2 ms)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Dimensiuni exterioare: L \u00d7 \u00ce \u00d7 G, mm<\/td>\n<td style=\"text-align: right; vertical-align: top;\">147 \u00d7 101,9 \u00d7 26,1<\/td>\n<td style=\"text-align: right; vertical-align: top;\">147 \u00d7 101,9 \u00d7 26,1<\/td>\n<td style=\"text-align: right; vertical-align: top;\">147 \u00d7 101,9 \u00d7 26,1<\/td>\n<td style=\"text-align: right; vertical-align: top;\">147 \u00d7 101,9 \u00d7 26,1<\/td>\n<td style=\"text-align: right; vertical-align: top;\">147 \u00d7 101,9 \u00d7 26,1<\/td>\n<td style=\"text-align: right; vertical-align: top;\">147 \u00d7 101,6 \u00d7 26,1<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Greutate, g<\/td>\n<td style=\"text-align: right; vertical-align: top;\">690<\/td>\n<td style=\"text-align: right; vertical-align: top;\">650<\/td>\n<td style=\"text-align: right; vertical-align: top;\">690<\/td>\n<td style=\"text-align: right; vertical-align: top;\">720<\/td>\n<td style=\"text-align: right; vertical-align: top;\">770<\/td>\n<td style=\"text-align: right; vertical-align: top;\">690<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Perioada de garan\u021bie, ani<\/td>\n<td style=\"text-align: right; vertical-align: top;\">5<\/td>\n<td style=\"text-align: right; vertical-align: top;\">5<\/td>\n<td style=\"text-align: right; vertical-align: top;\">3<\/td>\n<td style=\"text-align: right; vertical-align: top;\">5<\/td>\n<td style=\"text-align: right; vertical-align: top;\">3<\/td>\n<td style=\"text-align: right; vertical-align: top;\">5<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Pre\u021b cu am\u0103nuntul (SUA, f\u0103r\u0103 taxe), $<\/td>\n<td style=\"text-align: right; vertical-align: top;\">De la 549 (newegg.com)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">De la 289 (newegg.com)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">De la 351 (newegg.com)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">De la 301 (newegg.com)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">De la 439 (amazon.com)<\/td>\n<\/tr>\n<tr>\n<td style=\"text-align: left; vertical-align: top;\">Pre\u021b cu am\u0103nuntul (Rusia), rub.<\/td>\n<td style=\"text-align: right; vertical-align: top;\">De la 34 348 (market.yandex.ru)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">De la 17 498 (market.yandex.ru)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">De la 26 320 (market.yandex.ru)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">ND<\/td>\n<td style=\"text-align: right; vertical-align: top;\">De la 19 784 (market.yandex.ru)<\/td>\n<td style=\"text-align: right; vertical-align: top;\">De la 27 495 (market.yandex.ru)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Prima model\u0103 din colec\u021bia noastr\u0103 modest\u0103 de hard disk-uri cu capacitate considerabil\u0103 - BarraCuda Pro de 14 TByte - este un dispozitiv de stocare pentru PC-uri desktop \u0219i DAS, dar nu unul obi\u0219nuit, ci unul \u201eprofesional\u201d. Pe de o parte, acest lucru \u00eenseamn\u0103 c\u0103 BarraCuda Pro sufer\u0103 de limite tipice ale hard disk-urilor desktop. De exemplu, nu este destinat\u0103 pentru a fi integrat\u0103 \u00een array-uri RAID, deoarece pentru aceasta este de dorit s\u0103 existe TLER (Time-Limited Error Recovery) - o setare a firmware-ului care \u00eempiedic\u0103 ie\u0219irea HDD-ului din array din cauza \u00eencerc\u0103rilor \u00eendelungate ale microcontrolerului de a citi un sector problematic. \u00cen plus, \u0219asiul BarraCuda Pro este slab adaptat pentru a func\u021biona \u00eentr-un raft sau NAS cu mai multe co\u0219uri, deoarece nu are compensa\u021bie pentru vibra\u021biile de rota\u021bie.<\/p>\n<p>Dar, pe de alt\u0103 parte, spre deosebire de majoritatea celorlalte hard disk-uri desktop, HDD-ul acestei m\u0103rci dispune de o capacitate anual\u0103 de \u00eenc\u0103rcare crescut\u0103 - de p\u00e2n\u0103 la 300 TB de rescriere, este preg\u0103tit s\u0103 func\u021bioneze \u00een regim 24\/7 \u0219i beneficiaz\u0103 de o garan\u021bie de cinci ani. Cu siguran\u021b\u0103 nu va fi nevoie s\u0103 ne pl\u00e2ngem de performan\u021b\u0103 (cel pu\u021bin, \u00een sarcinile cu acces predominant liniar la date): datorit\u0103 celor opt platane de 1,75 TB, dispozitivul atinge o l\u0103\u021bime de band\u0103 constant\u0103 de 250 MB\/s. \u00cen plus, produc\u0103torul promite c\u0103 \u0219i viteza de acces aleatoriu \u00een BarraCuda Pro ar trebui s\u0103 fie mai mare comparativ cu discurile obi\u0219nuite de desktop, iar consumul de energie, dimpotriv\u0103, mai mic dec\u00e2t al celor mai multe modele de 3,5 inchi. Totu\u0219i, toate declara\u021biile Seagate vor fi verificate.<\/p>\n<p>Pentru a atinge un astfel de prag ridicat al densit\u0103\u021bii datelor \u00een cadrul standardului de \u00eenregistrare perpendicular\u0103 f\u0103r\u0103 aplicarea tehnologiei de ni\u0219\u0103 SMR (Shingled Magnetic Recording), Seagate a fost nevoit\u0103 s\u0103 implementeze una dintre metodele promi\u021b\u0103toare despre care scriem an de an \u00een studiile noastre. <noindex><a rel=\"nofollow\" href=\"https:\/\/3dnews.ru\/980108\">finale<\/a><\/noindex>, - cunoscut\u0103 sub numele de \u00eenregistrare magnetic\u0103 bidimensional\u0103 (Two-Dimensional Magnetic Recording). Dar, contrar numelui s\u0103u, TDMR nu este legat\u0103 \u00een vreun fel de procedura de \u00eenregistrare a datelor ca atare \u0219i este destinat\u0103 s\u0103 creasc\u0103 raportul semnal\/zgomot \u00een condi\u021bii de densitate mare a pistei pe plat\u0103 magnetic\u0103 prin citirea simultan\u0103 a pistei de c\u0103tre dou\u0103 capete de citire: acestea sunt dispuse \u00een a\u0219a fel \u00eenc\u00e2t c\u00e2mpul s\u0103 capteze pistele adiacent\u0103, iar compensarea interferen\u021bei devine mai u\u0219oar\u0103. \u00cen perspectiv\u0103, hard disk-urile cu TDMR vor aduna \u0219i mai multe capete, iar \u00eempreun\u0103 cu fiabilitatea citirii datelor, viteza acesteia ar putea cre\u0219te, dar acest lucru r\u0103m\u00e2ne de v\u0103zut \u00een viitor.<\/p>\n<p>Discurile BarraCuda Pro se diferen\u021biaz\u0103 \u00een mult de dispozitivele similare din seria inferioar\u0103 f\u0103r\u0103 sufixul Pro - \u00eencep\u00e2nd de la faptul c\u0103 toate modelele standard HDD ale produc\u0103torilor de desktop au stagnat la capacit\u0103\u021bi de 6\u20138 TB. Discul BarraCuda Pro poate fi descris mai degrab\u0103 ca un descendent al ramurii server Seagate, care nu dispune de func\u021bii legate de lucrul \u00een matrice. Dar, ca rezultat, \u0219i pre\u021bul dispozitivului a crescut la nivelul modelelor corporate, dac\u0103 nu chiar mai mult: \u00een Rusia, un model de 14 terabai\u021bi nu este mai ieftin de 34.348 ruble, iar pe pie\u021bele de retail din SUA - 549 $. Chiar \u0219i modelele nearline Seagate de aceea\u0219i capacitate cost\u0103 mai pu\u021bin - de la 375 $ sau 28.936 ruble.<\/p>\n<table>\n<tbody>\n<tr>\n<td>\n<img decoding=\"async\" alt=\"Articol nou: Testarea hard disk-urilor de 14\u201316 TB: nu doar mai mult, ci \u0219i mai bine\" src=\"\/wp-content\/uploads\/2019\/08\/96daab218db6946cb511528fdc8e4f9b.png\" style=\"display:block;margin: 0 auto;\" \/>\n<\/td>\n<td>&nbsp;<\/td>\n<td>\n<img decoding=\"async\" alt=\"Articol nou: Testarea hard disk-urilor de 14\u201316 TB: nu doar mai mult, ci \u0219i mai bine\" src=\"\/wp-content\/uploads\/2019\/08\/a08bccfd4532a952b2211b6ee5ec61cd.png\" style=\"display:block;margin: 0 auto;\" \/>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"3\">\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Urm\u0103torul subiect de testare, discul Ultrastar DC HC530 de 14 terabai\u021bi, este un dispozitiv de stocare de tip nearline care a reprezentat tot ce este mai bun din partea inginerilor Western Digital, p\u00e2n\u0103 c\u00e2nd a fost lansat un nou model de 16 TB. \u00cen practica 3DNews, acesta a fost primul hard disk de marca Ultrastar f\u0103r\u0103 literele familiare HGST \u00een denumire: compania a transferat toate modelele de server sub propriul s\u0103u brand, dup\u0103 ce activele HGST s-au integrat complet \u00een corpora\u021bia unificat\u0103. \u00cen ceea ce prive\u0219te caracteristicile cheie, acest dispozitiv este similar cu BarraCuda Pro de aceea\u0219i capacitate: \u00een interiorul carcasei etan\u0219e Ultrastar DC HC530 se afl\u0103 tot opt pl\u0103ci magnetice cu o capacitate util\u0103 de 1750 GB, iar citirea datelor de pe pistele dens amplasate este asigurat\u0103 de tehnologia TDMR. Cu toate acestea, din punctul de vedere al altor parametrii \u0219i al diversit\u0103\u021bii func\u021biilor suplimentare specifice HDD-urilor corporative, Ultrastar DC HC530 nu poate fi comparat cu modelele desktop, chiar dac\u0103 BarraCuda Pro nu este un exemplu tipic al categoriei sale.<\/p>\n<p>Astfel, densitatea util\u0103 de stocare pe pl\u0103cile BarraCuda Pro \u0219i Ultrastar DC HC530 este aceea\u0219i, la fel ca viteza de rota\u021bie a axului, dar produsul WD garanteaz\u0103 o vitez\u0103 constant\u0103 de citire \u0219i scriere a datelor semnificativ mai mare \u2014 de p\u00e2n\u0103 la 267 MB\/s (nu este clar de unde provine diferen\u021ba, dar testele vor ar\u0103ta dac\u0103 exist\u0103 cu adev\u0103rat). \u00cent\u00e2rzierile la accesul aleator sunt reduse printr-un actuator cu dou\u0103 etape de nou\u0103 genera\u021bie \u0219i un buffer mare de 512 MB, iar mai important, Media Cache \u2014 zonele rezervate pentru scrierea rapid\u0103 a blocurilor, dispersate pe suprafa\u021ba pl\u0103cilor. Aceast\u0103 caracteristic\u0103 \u00eei aseam\u0103n\u0103 pe hard disk-urile moderne nearline cu unit\u0103\u021bile de stocare solide, care au, de asemenea, o rela\u021bie variabil\u0103 \u00eentre sectoarele fizice \u0219i blocurile logice. \u00cencep\u00e2nd cu modelele de 10 terabai\u021bi Ultrastar DC HC330, WD utilizeaz\u0103 \u0219i o mic\u0103 cantitate de memorie flash pentru a accelera opera\u021biunile de scriere \u00een cache. Merit\u0103 men\u021bionat c\u0103, simultan cu (poten\u021bialul) extraordinar de mare \u00een ceea ce prive\u0219te viteza pentru unit\u0103\u021bile de stocare magnetice, produsul WD se distinge printr-o putere consumat\u0103 moderat\u0103 \u2014 de fapt, acesta este dispozitivul cu cel mai mic consum de energie dintre to\u021bi participan\u021bii la testare, conform specifica\u021biilor sale.<\/p>\n<p>Unit\u0103\u021bile de acest tip sunt construite av\u00e2nd \u00een vedere utilizarea continu\u0103 \u00een condi\u021bii de rack de server: montare bidirec\u021bional\u0103 a axului, compensarea vibra\u021biilor de rota\u021bie \u2013 aceste \u0219i alte caracteristici structurale ale Ultrastar DC HC530 au permis cre\u0219terea sarcinii proiectate a discului la 550 TB\/an, iar timpul mediu p\u00e2n\u0103 la defectare atinge valorile tipice pentru modelele nearline de 2,5 milioane de ore. \u00cen caz de o defec\u021biune pu\u021bin probabil\u0103 \u00een timpul actualiz\u0103rii firmware-ului, pe placa de control este montat un cip de rezerv\u0103. Discul este disponibil \u00een variante cu acces nativ la parti\u021bii de 4 KB sau cu simularea sectorilor de 512 byte, av\u00e2nd interfa\u021b\u0103 SATA sau SAS. \u00cen acest din urm\u0103 caz, este disponibil\u0103 \u0219i op\u021biunea de criptare complet\u0103 a datelor.<\/p>\n<p>Pre\u021burile de retail pentru WD Ultrastar DC HC530 \u00een configura\u021bia cu port SATA \u0219i simularea parti\u021biilor mo\u0219tenite de 512 byte se aliniaz\u0103 caracteristicilor \u0219i tehnologiilor de v\u00e2rf ale acestui dispozitiv: \u00eencep\u00e2nd de la 27.495 RON \u00een magazinele online din Rusia \u0219i 439 USD pe \u201eAmazon\u201d.<\/p>\n<table style=\"margin-left: auto; margin-right: auto;\">\n<tbody>\n<tr>\n<td>\n<img decoding=\"async\" alt=\"Articol nou: Testarea hard disk-urilor de 14\u201316 TB: nu doar mai mult, ci \u0219i mai bine\" src=\"\/wp-content\/uploads\/2019\/08\/ea7928793d082ea9c02ff976eabc8a72.png\" style=\"display:block;margin: 0 auto;\" \/>\n<\/td>\n<td>&nbsp;<\/td>\n<td>\n<img decoding=\"async\" alt=\"Articol nou: Testarea hard disk-urilor de 14\u201316 TB: nu doar mai mult, ci \u0219i mai bine\" src=\"\/wp-content\/uploads\/2019\/08\/33b78f70809e6b35ac8aa02e6e30e605.png\" style=\"display:block;margin: 0 auto;\" \/>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"3\">\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>A fost greu s\u0103 adun o colec\u021bie de hard diskuri de 14 TB pentru teste comparate \u0219i nu am reu\u0219it s\u0103 ob\u021bin un dispozitiv de la un al treilea produc\u0103tor \u2013 Toshiba. \u00cens\u0103 \u00een locul acestuia am ob\u021binut un model de genera\u021bie urm\u0103toare, de 16 TB. Acum, toate cele trei companii care produc hard diskuri ofer\u0103 unit\u0103\u021bi de asemenea capacitate, dar produsul Toshiba seria MG08 a fost printre ele primul. Recordul companiei japoneze se bazeaz\u0103 pe discuri cu o densitate de \u00eenregistrare fizic\u0103 similar\u0103, dac\u0103 nu chiar identic\u0103, cu cele ale hard diskurilor BarraCuda Pro \u0219i Ultrastar de 14 TB, dar Toshiba a reu\u0219it pentru prima dat\u0103 s\u0103 \u00eencarce nou\u0103 \u201ediscuri\u201d \u00eentr-o carcas\u0103 standard de 3,5 inch. Nu a lipsit tehnologia TDMR, care a devenit o condi\u021bie esen\u021bial\u0103 pentru atingerea de noi limite de capacitate. L\u0103\u021bimea de band\u0103 a Toshiba MG08 \u00een opera\u021biuni de citire\/scriere liniar\u0103 ar trebui s\u0103 fie comparabil\u0103 cu cea a WD Ultrastar DC HC530, dar, ciudat, produc\u0103torul nu ofer\u0103 detalii despre performan\u021bele dispozitivului.<\/p>\n<p>Este sigur c\u0103 Toshiba a luat m\u0103suri pentru a spori fiabilitatea \u0219i a reduce, \u00een acela\u0219i timp, laten\u021ba opera\u021biunilor de scriere: cipul de memorie flash din MG08 permite protejarea datelor trimise de controlerul gazd\u0103 la scriere \u00een cazul deconect\u0103rii accidentale de la alimentare \u0219i, conform rezultatelor testelor, \u00eendepline\u0219te \u0219i func\u021bia de cache de nivelul doi dup\u0103 bufferul DRAM. Totu\u0219i, aceast\u0103 tehnologie (Persistent Write Cache) apare doar \u00een specifica\u021biile discurilor cu emulare a sectorilor de 512 octe\u021bi, ceea ce reprezint\u0103 o surs\u0103 suplimentar\u0103 de risc \u00een cazul unei pene de curent (\u0219i \u00een oarecare m\u0103sur\u0103 afecteaz\u0103 performan\u021ba) din cauza necesit\u0103\u021bii de a efectua opera\u021bia read-modify-write pentru fiecare scriere a blocurilor logice care nu corespund limitelor sectoarelor fizice. De fapt, seria MG08 include \u0219i modele cu acces nativ la sectoare de 4 kilobyte. Nu \u0219tim dac\u0103 ultimele sunt complet lipsite de memorie flash sau dac\u0103 aceast\u0103 func\u021bie de backup a fost pur \u0219i simplu dezactivat\u0103. Dar, \u00een ciuda PWC, Toshiba MG08, precum \u0219i alte unit\u0103\u021bi ale acestei firme, utilizeaz\u0103 algoritmi Dynamic Cache, care, sus\u021bine produc\u0103torul, distribuie optim spa\u021biul bufferului \u00eentre opera\u021biunile de citire \u0219i scriere. Nu avem informa\u021bii detaliate despre acestea.<\/p>\n<p>Alte surse de rezisten\u021b\u0103 sporit\u0103 la defec\u021biuni \u00een construc\u021bia Toshiba MG08 includ montarea axului din ambele p\u0103r\u021bi \u0219i senzorii de vibra\u021bie rotativ\u0103. Aceste discuri sunt proiectate s\u0103 scrie 550 TB de date pe an, au un interval standard de func\u021bionare de 2,5 milioane de ore \u0219i o garan\u021bie de cinci ani. Sunt disponibile la comand\u0103 mai multe configura\u021bii diferite ale discurilor cu interfa\u021b\u0103 SATA sau SAS \u0219i o func\u021bie op\u021bional\u0103 de criptare end-to-end. Cu toate acestea, nu putem oferi informa\u021bii privind pre\u021bul: discul Toshiba de 16 terabytes a fost prezentat \u00eenc\u0103 din ianuarie, dar r\u0103m\u00e2ne o raritate \u00een v\u00e2nz\u0103rile cu am\u0103nuntul.<\/p>\n<p class=\"caption\">Toshiba MG08 16 TB<\/p>\n<p>Acum, c\u00e2nd ne-am familiarizat cu cei trei principali participan\u021bi la testare, s\u0103 ne uit\u0103m la hard disk-urile de capacitate mai mic\u0103, cu care va trebui s\u0103 compar\u0103m noile modele de 14-16 terabytes. Unul dintre acestea, Exos X10 cu o capacitate de 10 TB, este un dispozitiv de stocare nearline, care con\u021bine \u0219apte discuri magnetice \u00eentr-un carcas\u0103 etan\u0219\u0103. \u0218i de\u0219i de atunci capacitatea util\u0103 a discului a crescut de la 1429 la 1750 GB \u0219i mai mult, viteza de acces secven\u021bial pe hard disk-uri ar trebui s\u0103 creasc\u0103 de asemenea, \u00een aceast\u0103 privin\u021b\u0103 Exos X10 nu are aproape nimic de invidiat fa\u021b\u0103 de aceea\u0219i BarraCuda Pro de 14 TB conform specifica\u021biilor ambelor dispozitive de stocare. Ceva nu se leag\u0103 \u00een specifica\u021biile hard disk-urilor Seagate, dar avem ocazia s\u0103 afl\u0103m totul \u00een practic\u0103.<\/p>\n<p>Pentru a cre\u0219te viteza opera\u021biunilor de acces aleator, seria Exos dispune de un mecanism avansat de cache pentru scriere AWC (Advanced Write Caching), care reduce timpul de r\u0103spuns. \u00cen cadrul AWC, opera\u021biile de scriere sunt grupate \u00een buffer-ul DRAM, a\u0219a cum se \u00eent\u00e2mpl\u0103 \u00een orice alt hard disk, totu\u0219i buffer-ul p\u0103streaz\u0103 o copie a datelor dup\u0103 ce acestea sunt scrise pe disc, iar con\u021binutul buffer-ului mirror poate fi citit imediat de c\u0103tre controlerul gazd\u0103. \u00cen <noindex><a rel=\"nofollow\" href=\"https:\/\/servernews.ru\/968036\">discurile dure pentru servere Seagate<\/a><\/noindex> AWC de 2,5 inci include urm\u0103toarea etap\u0103 de vitez\u0103 &mdash; zone rezervate pe suprafa\u021ba discurilor, unde datele din DRAM sunt scrise \u00een mod secven\u021bial (Media Cache), precum \u0219i un mic volum de memorie non-volatil\u0103 pentru salvarea datelor din buffer \u00een caz de \u00eentrerupere a aliment\u0103rii. Dar \u00een Exos X10 nu exist\u0103 memorie flash, posibil chiar nici Media Cache.<\/p>\n<p>Discurile Exos se diferen\u021biaz\u0103 de unit\u0103\u021bile de stocare pentru computerele personale \u0219i NAS prin durabilitatea ridicat\u0103 (2,5 milioane de ore) \u0219i sarcina estimat\u0103 (550 TB\/an), av\u00e2nd capacitatea de a func\u021biona \u00een rackuri de server f\u0103r\u0103 restric\u021bii privind num\u0103rul de unit\u0103\u021bi, precum \u0219i o garan\u021bie de cinci ani. Hard disk-ul cu num\u0103rul de model ST10000NM0016, pe care l-am testat, apar\u021bine modific\u0103rilor Hyperscale, av\u00e2nd un consum de energie redus comparativ cu altele din familia Exos, dar fiind disponibil doar cu interfa\u021ba SATA \u0219i simularea sectorilor de 512 octe\u021bi. \u00cen configura\u021biile cu interfa\u021b\u0103 SAS, modelele Exos includ op\u021biuni cu acces nativ la sectoare de 4 kiloocte\u021bi \u0219i cu func\u021bia de criptare complet\u0103 a discului.<\/p>\n<table style=\"margin-left: auto; margin-right: auto;\">\n<tbody>\n<tr>\n<td>\n<img decoding=\"async\" alt=\"Articol nou: Testarea hard disk-urilor de 14\u201316 TB: nu doar mai mult, ci \u0219i mai bine\" src=\"\/wp-content\/uploads\/2019\/08\/94efd8bafc7437361b72c678c491dd4a.png\" style=\"display:block;margin: 0 auto;\" \/>\n<\/td>\n<td>&nbsp;<\/td>\n<td>\n<img decoding=\"async\" alt=\"Articol nou: Testarea hard disk-urilor de 14\u201316 TB: nu doar mai mult, ci \u0219i mai bine\" src=\"\/wp-content\/uploads\/2019\/08\/528d8fa984117f834bbfbc153c3bc080.png\" style=\"display:block;margin: 0 auto;\" \/>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"3\">\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Hard disk-ul Seagate IronWolf a fost recent men\u021bionat \u00een <noindex><a rel=\"nofollow\" href=\"https:\/\/servernews.ru\/988714\">recenzia noastr\u0103<\/a><\/noindex> noii reprezentan\u021bi ai acestei m\u0103rci \u00eempreun\u0103 cu un SSD Seagate pentru stocarea \u00een re\u021bea. Modelul IronWolf de 12 terabyte se pare c\u0103 este echipat cu discuri cu aceea\u0219i densitate fizic\u0103 de \u00eenregistrare ca \u0219i Exos X10, cu o unitate mai mult. Cu toate acestea, Seagate evalueaz\u0103 performan\u021ba produsului s\u0103u \u00een opera\u021biile de citire \u0219i scriere secven\u021bial\u0103 mult mai sc\u0103zut &mdash; doar 210 MB\/s. \u0218i nu sunt utilizate tehnologiile sofisticate menite s\u0103 compenseze laten\u021ba mare a r\u0103spunsului specific discurilor magnetice.<\/p>\n<p>\u00cen schimb, toate hard disk-urile IronWolf, \u00eencep\u00e2nd cu capacitatea de 4 TB, au \u00eemprumutat din seria Exos o serie de caracteristici hardware care contribuie la o rezisten\u021b\u0103 mai mare la defec\u021biuni. Blocul de discuri magnetice al fiec\u0103rui hard disk este echilibrat pe dou\u0103 planuri, iar senzorii de vibra\u021bie rotativ\u0103 asigur\u0103 o func\u021bionare stabil\u0103 \u00eentr-un sistem de stocare RAID sau \u00eentr-un NAS autonom cu p\u00e2n\u0103 la opt suporturi de disc. IronWolf este proiectat pentru un mod de operare moderat, cu o sarcin\u0103 anual\u0103 de 180 TB, \u0219i se caracterizeaz\u0103 printr-un timp mediu de func\u021bionare \u00eentre defecte de 1 milion de ore. Drept urmare, \u0219i perioada de garan\u021bie pentru IronWolf nu este la fel de lung\u0103 ca cea pentru modelele mai serioase din catalogul Seagate &mdash; trei ani.<\/p>\n<table style=\"margin-left: auto; margin-right: auto;\">\n<tbody>\n<tr>\n<td>\n<img decoding=\"async\" alt=\"Articol nou: Testarea hard disk-urilor de 14\u201316 TB: nu doar mai mult, ci \u0219i mai bine\" src=\"\/wp-content\/uploads\/2019\/08\/6cf7903f36edffe3a123a73af28d89d2.png\" style=\"display:block;margin: 0 auto;\" \/>\n<\/td>\n<td>&nbsp;<\/td>\n<td>\n<img decoding=\"async\" alt=\"Articol nou: Testarea hard disk-urilor de 14\u201316 TB: nu doar mai mult, ci \u0219i mai bine\" src=\"\/wp-content\/uploads\/2019\/08\/27869df3d049f22101d713452b58975b.png\" style=\"display:block;margin: 0 auto;\" \/>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"3\">\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Sub marca S300, compania japonez\u0103 Toshiba a lansat o serie de unit\u0103\u021bi de stocare pentru sisteme de supraveghere video &mdash; aceste hard disk-uri beneficiaz\u0103 de asemenea de o gam\u0103 dedicat\u0103. <noindex><a rel=\"nofollow\" href=\"https:\/\/3dnews.ru\/980094\">recenzie<\/a><\/noindex> pe paginile 3DNews. Datorit\u0103 extinderii protocoalelor de transfer de date ATA Streaming Command Set, modelele superioare Toshiba S300 garanteaz\u0103 \u00eenregistrarea simultan\u0103 a video-ului de la 64 de camere de supraveghere, dar \u00een esen\u021b\u0103 sunt unit\u0103\u021bi tipice pentru NAS \u0219i DAS, cu posibilitatea de utilizare 24\/7 \u0219i o durat\u0103 de via\u021b\u0103 considerabil\u0103: la fel ca la IronWolf, aceasta se ridic\u0103 la 1 milion de ore, iar perioada de garan\u021bie este de trei ani. Datorit\u0103 avantajelor structurale ale carcasei S300 \u2014 cu suportul axului de rota\u021bie din dou\u0103 p\u0103r\u021bi \u0219i compensarea activ\u0103 a vibra\u021biilor de rota\u021bie \u2014 este permis\u0103 instalarea a mai mult de opt astfel de dispozitive \u00eentr-un singur rack sau NAS autonom.<\/p>\n<p>Modelul S300, selectat pentru comparare cu noile lans\u0103ri de 14\u201316 TB, este construit pe baza carcasei hardware a discurilor server MD06ACA-V \u0219i con\u021bine \u0219apte discuri magnetice, iar \u00een specifica\u021biile dispozitivului este indicat\u0103 o vitez\u0103 tipic\u0103 de citire\/scriere aleatorie de 248 MB\/s, specific\u0103 pentru HDD-urile de mari capacitate moderne. Dintre acele tehnici folosite \u00een hard disk-urile serverelor Toshiba pentru a reduce laten\u021ba, S300 a p\u0103strat doar func\u021bia Dynamic Cache.<\/p>\n<p>Spre deosebire de to\u021bi ceilal\u021bi participan\u021bi la testare, S300, chiar \u0219i cu un stack dens de \u0219apte discuri, se descurc\u0103 f\u0103r\u0103 heliu \u0219i este realizat \u00eentr-o carcasa ventilat\u0103 standard. Se pare c\u0103 tocmai din acest motiv modelul de 10 TB are cel mai mare consum de energie din tabelul de specifica\u021bii al participan\u021bilor la testare, iar acest parametru, de\u0219i important \u00een mod direct doar pentru administratorii centrelor de date, determin\u0103 temperatura HDD-ului. Vom verifica noi consumul real de energie al S300, dar p\u00e2n\u0103 atunci vom lua acest punct \u00een considerare.<\/p>\n<table style=\"margin-left: auto; margin-right: auto;\">\n<tbody>\n<tr>\n<td>\n<img decoding=\"async\" alt=\"Articol nou: Testarea hard disk-urilor de 14\u201316 TB: nu doar mai mult, ci \u0219i mai bine\" src=\"\/wp-content\/uploads\/2019\/08\/0f65f032af76520523c908250a1fe1db.png\" style=\"display:block;margin: 0 auto;\" \/>\n<\/td>\n<td>&nbsp;<\/td>\n<td>\n<img decoding=\"async\" alt=\"Articol nou: Testarea hard disk-urilor de 14\u201316 TB: nu doar mai mult, ci \u0219i mai bine\" src=\"\/wp-content\/uploads\/2019\/08\/5923d084a16f03c50d627f967c6937b2.png\" style=\"display:block;margin: 0 auto;\" \/>\n<\/td>\n<\/tr>\n<tr>\n<td colspan=\"3\">\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<p>Sursa: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/3dnews.ru\/991861\">3dnews.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u0415\u043c\u043a\u043e\u0441\u0442\u044c \u0436\u0435\u0441\u0442\u043a\u0438\u0445 \u0434\u0438\u0441\u043a\u043e\u0432 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u0442 \u0443\u0432\u0435\u043b\u0438\u0447\u0438\u0432\u0430\u0442\u044c\u0441\u044f, \u043d\u043e \u0442\u0435\u043c\u043f\u044b \u0440\u043e\u0441\u0442\u0430 \u0432 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0435 \u0433\u043e\u0434\u044b \u043d\u0435\u0443\u043a\u043b\u043e\u043d\u043d\u043e \u0441\u043d\u0438\u0436\u0430\u044e\u0442\u0441\u044f. \u0422\u0430\u043a, \u0434\u043b\u044f \u0442\u043e\u0433\u043e, \u0447\u0442\u043e\u0431\u044b \u0432\u044b\u043f\u0443\u0441\u0442\u0438\u0442\u044c \u043f\u0435\u0440\u0432\u044b\u0439 \u043d\u0430\u043a\u043e\u043f\u0438\u0442\u0435\u043b\u044c \u0435\u043c\u043a\u043e\u0441\u0442\u044c\u044e 4 \u0422\u0431\u0430\u0439\u0442 \u043f\u043e\u0441\u043b\u0435 \u0442\u043e\u0433\u043e, \u043a\u0430\u043a \u0432 \u043f\u0440\u043e\u0434\u0430\u0436\u0435 \u043f\u043e\u044f\u0432\u0438\u043b\u0438\u0441\u044c 2-\u0442\u0435\u0440\u0430\u0431\u0430\u0439\u0442\u043d\u044b\u0435 HDD, \u0438\u043d\u0434\u0443\u0441\u0442\u0440\u0438\u044f \u043f\u043e\u0442\u0440\u0430\u0442\u0438\u043b\u0430 \u0432\u0441\u0435\u0433\u043e \u0434\u0432\u0430 \u0433\u043e\u0434\u0430, \u043d\u0430 \u043f\u043e\u043a\u043e\u0440\u0435\u043d\u0438\u0435 \u043e\u0442\u043c\u0435\u0442\u043a\u0438 \u0432 8 \u0422\u0431\u0430\u0439\u0442 \u0443\u0448\u043b\u043e \u0442\u0440\u0438, \u0430 \u0443\u0434\u0432\u043e\u0438\u0442\u044c \u043e\u0431\u044a\u0435\u043c 3,5-\u0434\u044e\u0439\u043c\u043e\u0432\u043e\u0433\u043e \u0436\u0435\u0441\u0442\u043a\u043e\u0433\u043e \u0434\u0438\u0441\u043a\u0430 \u0435\u0449\u0435 \u0440\u0430\u0437 \u0443\u0434\u0430\u043b\u043e\u0441\u044c \u043b\u0438\u0448\u044c \u0437\u0430 [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":27857,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[702],"tags":[],"class_list":["post-37155","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 5.0.2.1 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u0415\u043c\u043a\u043e\u0441\u0442\u044c \u0436\u0435\u0441\u0442\u043a\u0438\u0445 \u0434\u0438\u0441\u043a\u043e\u0432 \u043f\u0440\u043e\u0434\u043e\u043b\u0436\u0430\u0435\u0442 \u0443\u0432\u0435\u043b\u0438\u0447\u0438\u0432\u0430\u0442\u044c\u0441\u044f, \u043d\u043e \u0442\u0435\u043c\u043f\u044b \u0440\u043e\u0441\u0442\u0430 \u0432 \u043f\u043e\u0441\u043b\u0435\u0434\u043d\u0438\u0435 \u0433\u043e\u0434\u044b 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