{"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\/cs\/blog\/news\/novaya-statya-testirovanie-zhestkih-diskov-obemom-14-16-tbajt-ne-tolko-bolshe-no-i-luchshe","title":{"rendered":"Nov\u00fd \u010dl\u00e1nek: Testov\u00e1n\u00ed pevn\u00fdch disk\u016f o kapacit\u011b 14\u201316 TB: nejen v\u00edce, ale i l\u00e9pe","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"

Kapacita pevn\u00fdch disk\u016f neust\u00e1le roste, ale tempo r\u016fstu se v posledn\u00edch letech ustavi\u010dn\u011b sni\u017euje. Nap\u0159\u00edklad k uveden\u00ed prvn\u00edho disku s kapacitou 4 TB po tom, co se na trhu objevily 2TB HDD, pr\u016fmysl pot\u0159eboval pouze dva roky, k p\u0159ekon\u00e1n\u00ed hranice 8 TB to trvalo t\u0159i roky a zdvojn\u00e1sobit objem 3,5palcov\u00e9ho pevn\u00e9m disku se poda\u0159ilo a\u017e po p\u011bti letech.<\/p>\n

Posledn\u00ed pokrok byl mo\u017en\u00fd d\u00edky \u0159ad\u011b inovativn\u00edch \u0159e\u0161en\u00ed. Dnes dokonce i takov\u00ed konzervativci, jako je Toshiba, kter\u00e1 se dlouho br\u00e1nila helia, mus\u00ed vyr\u00e1b\u011bt pevn\u00e9 disky v hermetick\u00fdch sk\u0159\u00edn\u00edch, a po\u010det ploten na h\u0159\u00eddeli vzrostl na dev\u011bt kus\u016f \u2014 i kdy\u017e kdysi p\u011bt ploten bylo pova\u017eov\u00e1no za rozumn\u00fd limit. V specifick\u00fdch nik\u00e1ch se pou\u017e\u00edv\u00e1 technologie tzv. \u0161indelov\u00e9ho z\u00e1znamu (SMR, Shingled Magnetic Recording), v r\u00e1mci kter\u00e9 se stopy sektor\u016f na plotn\u011b \u010d\u00e1ste\u010dn\u011b p\u0159ekr\u00fdvaj\u00ed. A nakonec, aby se posunul limit kapacity pevn\u00e9ho disku z 14 na 16 TB bez pou\u017eit\u00ed SMR, museli v\u00fdrobci implementovat jednu z pokrokov\u00fdch technologi\u00ed, jejich\u017e seznam se postupn\u011b zten\u010duje, kter\u00fd reprodukujeme v ro\u010dn\u00edch z\u00e1v\u011bre\u010dn\u00fdch \u010dl\u00e1nc\u00edch<\/a><\/noindex>, \u2014 \u010dten\u00ed stopy n\u011bkolika hlavami sou\u010dasn\u011b (TDMR, Two-Dimensional Magnetic Recording). Dal\u0161\u00ed posuny d\u0159\u00edve \u010di pozd\u011bji vy\u017eaduj\u00ed i v\u011bt\u0161\u00ed zm\u011bny v z\u00e1kladech pr\u00e1ce HDD \u2014 jako je oh\u0159ev plotny pomoc\u00ed laseru nebo mikrovlna (HAMR\/MAMR, Heat\/Microwave-Assisted Magnetic Recording) v okam\u017eiku, kdy proch\u00e1z\u00ed zapisovac\u00ed hlava.<\/p>\n

Je v\u0161ak snadn\u00e9 si v\u0161imnout, \u017ee v\u0161echny popsan\u00e9 postupy jsou zam\u011b\u0159eny p\u0159edev\u0161\u00edm na zvy\u0161ov\u00e1n\u00ed hustoty z\u00e1znamu a zv\u011bt\u0161en\u00ed objemu na jedn\u00e9 h\u0159\u00eddeli, p\u0159i\u010dem\u017e mnoh\u00e9 z nich maj\u00ed p\u0159\u00edzniv\u00fd vedlej\u0161\u00ed efekt v podob\u011b zv\u00fd\u0161en\u00e9 rychlosti liniov\u00e9ho \u010dten\u00ed a z\u00e1pisu dat. V tomto parametru sou\u010dasn\u00e9 HDD p\u0159ekro\u010dily hranici 250 MB\/s a u\u017e jsou srovnateln\u00e9 s ran\u00fdmi spot\u0159ebitelsk\u00fdmi SSD. Ale rychlost p\u0159\u00edstupu k n\u00e1hodn\u00fdm sektor\u016fm magnetick\u00fdch disk\u016f t\u00e9m\u011b\u0159 nepokro\u010dila, a v p\u0159epo\u010dtu na objem se po\u010det operac\u00ed za sekundu st\u00e1v\u00e1 pouze men\u0161\u00edm. Z\u00e1rove\u0148 vznikaj\u00ed vy\u0161\u0161\u00ed po\u017eadavky na odolnost, proto\u017ee \u010d\u00edm v\u00edce dat je ulo\u017eeno na jedn\u00e9 h\u0159\u00eddeli, t\u00edm d\u016fle\u017eit\u011bj\u0161\u00ed je je neztratit a t\u00edm d\u00e9le je obnovit.<\/p>\n

\"Nov\u00fd<\/p>\n

Ale i na tuto v\u00fdzvu na\u0161li tv\u016frci magnetick\u00fdch \u00falo\u017en\u00fdch za\u0159\u00edzen\u00ed odpov\u011b\u010f. Vzali jsme t\u0159i pevn\u00e9 disky o objemu od 14 do 16 TB, abychom zjistili, jak se technologie 64 let star\u00e9 p\u0159izp\u016fsobuj\u00ed realit\u011b roku 2019, a zaznamenali jsme n\u011bkolik trend\u016f. \u0160ampion\u0161t\u00ed p\u0159edstavitel\u00e9 modern\u00edch 3,5palcov\u00fdch pevn\u00fdch disk\u016f, vyr\u00e1b\u011bn\u00e9 pro stojanov\u00e9 servery a S\u00daS, maj\u00ed n\u011bco spole\u010dn\u00e9ho s pevn\u00fdmi \u00falo\u017ei\u0161ti \u2014 od princip\u016f adresace sektor\u016f a\u017e po p\u0159\u00edmou integraci flash \u010dip\u016f v m\u00edstn\u00edm z\u00e1sobn\u00edku pam\u011bti. A spot\u0159ebitelsk\u00e9 modely se zase p\u0159ibl\u00ed\u017eily sv\u00fdm charakteristik\u00e1m k serverov\u00fdm analog\u016fm, a dokonce popis \u201edesktopov\u00e9ho HDD\u201c u\u017e ne\u0159\u00edk\u00e1 tolik o v\u00fdkonnosti a spolehlivosti za\u0159\u00edzen\u00ed. Ale \u00fakolem t\u00e9to recenze nen\u00ed omezit se na obecn\u00e1 slova. Chceme zjistit, jak nov\u00e9 trendy ve konstrukci pevn\u00fdch disk\u016f se projevuj\u00ed v pevn\u00fdch \u010d\u00edslech m\u011b\u0159en\u00ed v\u00fdkonnosti.<\/p>\n

\u2b07<\/a><\/noindex>#<\/a><\/noindex>Technick\u00e9 specifikace \u00fa\u010dastn\u00edk\u016f testu<\/strong><\/h2>\n

Ne\u017e za\u010dneme analyzovat testovac\u00ed v\u00fdsledky, je d\u016fle\u017eit\u00e9 pe\u010dliv\u011b prozkoumat vlastnosti za\u0159\u00edzen\u00ed, se kter\u00fdmi budeme m\u00edt co do \u010din\u011bn\u00ed. Tentokr\u00e1t jich nen\u00ed tolik jako obvykle v na\u0161ich skupinov\u00fdch testech, ale splnili jsme hlavn\u00ed podm\u00ednky, bez kter\u00fdch by srovn\u00e1n\u00ed pevn\u00fdch disk\u016f nemohlo b\u00fdt \u00fapln\u00e9. V p\u0159ehledu se pod\u00edlely produkty v\u0161ech t\u0159\u00ed v\u00fdrobc\u016f \u2014 Seagate, Toshiba a Western Digital, kter\u00e9 pat\u0159\u00ed do r\u016fzn\u00fdch kategori\u00ed: spot\u0159ebitelsk\u00fdch a serverov\u00fdch. Hlavn\u00ed charakteristiky, kter\u00e9 je spojuj\u00ed, jsou kapacita 14 nebo 16 TB, hermeticky uzav\u0159en\u00fd obal vypln\u011bn\u00fd heliem a rychlost ot\u00e1\u010den\u00ed 7200 ot.\/min. A pro srovn\u00e1n\u00ed s t\u011b\u017ek\u00fdmi v\u00e1hami se do testov\u00e1n\u00ed zapojuj\u00ed t\u0159i n\u00e1m ji\u017e zn\u00e1m\u00e9 za\u0159\u00edzen\u00ed men\u0161\u00edch kapacit (10 a 12 TB), ur\u010den\u00e9 pro provoz na serverech, dom\u00e1c\u00edch nebo kancel\u00e1\u0159sk\u00fdch NAS.<\/p>\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n\n
V\u00fdrobce<\/th>\nSeagate<\/th>\nToshiba<\/th>\nWestern Digital<\/th>\n<\/tr>\n
S\u00e9rie<\/td>\nBarraCuda Pro<\/td>\nExos X10<\/td>\nIronWolf<\/td>\nMG08<\/td>\nS300<\/td>\nUltrastar DC HC530<\/td>\n<\/tr>\n
Modelov\u00e9 \u010d\u00edslo<\/td>\nST14000DM001<\/td>\nST10000NM0016<\/td>\nST12000VN0008<\/td>\nMG08ACA16TE<\/td>\nHDWT31AUZSVA<\/td>\nWUH721414ALE6L4<\/td>\n<\/tr>\n
Form\u00e1t<\/td>\n3,5 palce<\/td>\n3,5 palce<\/td>\n3,5 palce<\/td>\n3,5 palce<\/td>\n3,5 palce<\/td>\n3,5 palce<\/td>\n<\/tr>\n
Rozhran\u00ed<\/td>\nSATA 6 Gb\/s<\/td>\nSATA 6 Gb\/s<\/td>\nSATA 6 Gb\/s<\/td>\nSATA 6 Gb\/s<\/td>\nSATA 6 Gb\/s<\/td>\nSATA 6 Gb\/s<\/td>\n<\/tr>\n
Kapacita, GB<\/td>\n14 000<\/td>\n10 000<\/td>\n12 000<\/td>\n16 000<\/td>\n10 000<\/td>\n14 000<\/td>\n<\/tr>\n
Konfigurace<\/td>\n<\/tr>\n
Rychlost ot\u00e1\u010den\u00ed v\u0159etena, ot.\/min<\/td>\n7 200<\/td>\n7 200<\/td>\n7 200<\/td>\n7 200<\/td>\n7 200<\/td>\n7 200<\/td>\n<\/tr>\n
U\u017eite\u010dn\u00e1 hustota z\u00e1pisu dat, GB\/plotna<\/td>\n1 750<\/td>\n1 429<\/td>\n1 500<\/td>\n1 778<\/td>\n1 429<\/td>\n1 750<\/td>\n<\/tr>\n
Po\u010det ploten\/hlav<\/td>\n8\/16<\/td>\n7\/14<\/td>\n8\/16<\/td>\n9\/18<\/td>\n7\/14<\/td>\n8\/16<\/td>\n<\/tr>\n
Velikost sektoru, bajt\u016f<\/td>\n4096 (emulace 512 bajt\u016f)<\/td>\n4096 (emulace 512 bajt\u016f)<\/td>\n4096 (emulace 512 bajt\u016f)<\/td>\n4096 (emulace 512 bajt\u016f)<\/td>\n4096 (emulace 512 bajt\u016f)<\/td>\n4096 (emulace 512 bajt\u016f)<\/td>\n<\/tr>\n
Objem vyrovn\u00e1vac\u00ed pam\u011bti, MB<\/td>\n256<\/td>\n256<\/td>\n256<\/td>\n512<\/td>\n256<\/td>\n512<\/td>\n<\/tr>\n
V\u00fdkon<\/td>\n<\/tr>\n
Max. stabiln\u00ed rychlost sekven\u010dn\u00edho \u010dten\u00ed, MB\/s<\/td>\n250<\/td>\n249<\/td>\n210<\/td>\nDPH<\/td>\n248<\/td>\n267<\/td>\n<\/tr>\n
Max. stabiln\u00ed rychlost sekven\u010dn\u00edho z\u00e1pisu, MB\/s<\/td>\n250<\/td>\n249<\/td>\n210<\/td>\nDPH<\/td>\n248<\/td>\n267<\/td>\n<\/tr>\n
Pr\u016fm\u011brn\u00e1 doba vyhled\u00e1v\u00e1n\u00ed: \u010dten\u00ed\/z\u00e1pis, ms<\/td>\nDPH<\/td>\nDPH<\/td>\nDPH<\/td>\nDPH<\/td>\nDPH<\/td>\n7,5\/ND<\/td>\n<\/tr>\n
Odolnost proti v\u00fdpadk\u016fm<\/td>\n<\/tr>\n
Odhadovan\u00e1 z\u00e1t\u011b\u017e, TB\/g<\/td>\n300<\/td>\nDPH<\/td>\n180<\/td>\n550<\/td>\n180<\/td>\n550<\/td>\n<\/tr>\n
Neopraviteln\u00e9 chyby \u010dten\u00ed, po\u010det p\u0159\u00edpad\u016f na objem dat (bit)<\/td>\n1\/10^15<\/td>\n1\/10^15<\/td>\n1\/10^15<\/td>\n10\/10^16<\/td>\n10\/10^14<\/td>\n1\/10^15<\/td>\n<\/tr>\n
MTBF (pr\u016fm\u011brn\u00e1 doba mezi poruchami), h<\/td>\nDPH<\/td>\n2 500 000<\/td>\n1 000 000<\/td>\n2 500 000<\/td>\n1 000 000<\/td>\n2 500 000<\/td>\n<\/tr>\n
AFR (pravd\u011bpodobnost selh\u00e1n\u00ed za rok), %<\/td>\nDPH<\/td>\n0,35<\/td>\nDPH<\/td>\nDPH<\/td>\nDPH<\/td>\n0,35<\/td>\n<\/tr>\n
Po\u010det cykl\u016f parkov\u00e1n\u00ed hlavi\u010dek<\/td>\n300 000<\/td>\n600 000<\/td>\n600 000<\/td>\n600 000<\/td>\n600 000<\/td>\n600 000<\/td>\n<\/tr>\n
Fyzick\u00e9 charakteristiky<\/td>\n<\/tr>\n
Spot\u0159eba energie: ne\u010dinnost\/\u010dten\u00ed-z\u00e1pis, W<\/td>\n4,9\/6,9<\/td>\n4,5\/8,4<\/td>\n5,0\/7,8<\/td>\nDPH<\/td>\n7,15\/9,48<\/td>\n5,5\/6,0<\/td>\n<\/tr>\n
Hladina hluku: ne\u010dinnost\/hled\u00e1n\u00ed, B<\/td>\nDPH<\/td>\nDPH<\/td>\n1,8\/2,8<\/td>\n2,0\/ND<\/td>\n3,4\/ND<\/td>\n2,0\/3,6<\/td>\n<\/tr>\n
Maxim\u00e1ln\u00ed teplota, \u00b0C: disk zapnut\u00fd\/disk vypnut\u00fd<\/td>\n60\/70<\/td>\n60\/ND<\/td>\n70\/70<\/td>\n55\/70<\/td>\n70\/70<\/td>\n60\/70<\/td>\n<\/tr>\n
Odolnost proti n\u00e1razu: disk zapnut\u00fd\/disk vypnut\u00fd<\/td>\nDPH<\/td>\n40 g (2 ms)\/250 g (2 ms)<\/td>\n70 g (2 ms)\/250 g (2 ms)<\/td>\n70 g (2 ms)\/250 g (2 ms)<\/td>\n70 g (2 ms)\/250 g (2 ms)<\/td>\n70 g (2 ms)\/300 g (2 ms)<\/td>\n<\/tr>\n
Rozm\u011bry: D \u00d7 V \u00d7 H, mm<\/td>\n147 \u00d7 101,9 \u00d7 26,1<\/td>\n147 \u00d7 101,9 \u00d7 26,1<\/td>\n147 \u00d7 101,9 \u00d7 26,1<\/td>\n147 \u00d7 101,9 \u00d7 26,1<\/td>\n147 \u00d7 101,9 \u00d7 26,1<\/td>\n147 \u00d7 101,6 \u00d7 26,1<\/td>\n<\/tr>\n
Hmotnost, g<\/td>\n690<\/td>\n650<\/td>\n690<\/td>\n720<\/td>\n770<\/td>\n690<\/td>\n<\/tr>\n
Z\u00e1ru\u010dn\u00ed doba, roky<\/td>\n5<\/td>\n5<\/td>\n3<\/td>\n5<\/td>\n3<\/td>\n5<\/td>\n<\/tr>\n
Maloobchodn\u00ed cena (USA, bez dan\u011b), $<\/td>\nOd 549 (newegg.com)<\/td>\nOd 289 (newegg.com)<\/td>\nOd 351 (newegg.com)<\/td>\nDPH<\/td>\nOd 301 (newegg.com)<\/td>\nOd 439 (amazon.com)<\/td>\n<\/tr>\n
Maloobchodn\u00ed cena (Rusko), rub.<\/td>\nOd 34 348 (market.yandex.ru)<\/td>\nOd 17 498 (market.yandex.ru)<\/td>\nOd 26 320 (market.yandex.ru)<\/td>\nDPH<\/td>\nOd 19 784 (market.yandex.ru)<\/td>\nOd 27 495 (market.yandex.ru)<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Prvn\u00ed model v na\u0161\u00ed skromn\u00e9 kolekci pevn\u00fdch disk\u016f nesm\u00edrn\u00e9ho objemu \u2014 BarraCuda Pro 14 TB \u2014 je \u00falo\u017ei\u0161t\u011b pro stoln\u00ed PC a DAS, ale ne b\u011b\u017en\u00e9, n\u00fdbr\u017e \u201eprofesion\u00e1ln\u00ed\u201c. Na jedn\u00e9 stran\u011b to znamen\u00e1, \u017ee BarraCuda Pro podl\u00e9h\u00e1 typick\u00fdm omezen\u00edm desktopov\u00fdch pevn\u00fdch disk\u016f. Nap\u0159\u00edklad nen\u00ed ur\u010dena pro spojen\u00e9 pou\u017eit\u00ed v RAID pol\u00edch, proto\u017ee pro to je \u017e\u00e1douc\u00ed m\u00edt TLER (Time-Limited Error Recovery) \u2014 nastaven\u00ed firmwaru, kter\u00e9 zabra\u0148uje vypadnut\u00ed HDD z pole kv\u016fli dlouh\u00fdm pokus\u016fm mikro\u0159adi\u010de \u010d\u00edst probl\u00e9mov\u00fd sektor. Krom\u011b toho je \u0161asi BarraCuda Pro \u0161patn\u011b p\u0159izp\u016fsobeno pro pr\u00e1ci v reg\u00e1lu nebo NAS s n\u011bkolika p\u0159ihr\u00e1dkami, proto\u017ee nem\u00e1 kompenzaci rota\u010dn\u00edch vibrac\u00ed.<\/p>\n

Na druh\u00e9 stran\u011b, na rozd\u00edl od v\u011bt\u0161iny ostatn\u00edch desktopov\u00fdch pevn\u00fdch disk\u016f, maj\u00ed HDD t\u00e9to zna\u010dky zv\u00fd\u0161en\u00fd ro\u010dn\u00ed z\u00e1t\u011b\u017eov\u00fd cyklus a\u017e 300 TB p\u0159eps\u00e1n\u00ed, jsou p\u0159ipraveny pracovat v re\u017eimu 24\/7 a jsou dod\u00e1v\u00e1ny s p\u011btiletou z\u00e1rukou. Na rychlosti tak\u00e9 nebudete pravd\u011bpodobn\u011b si st\u011b\u017eovat (alespo\u0148 p\u0159i \u00faloh\u00e1ch se p\u0159ev\u00e1\u017en\u011b line\u00e1rn\u00edm p\u0159\u00edstupem k dat\u016fm): d\u00edky osmi plotn\u00e1m po 1,75 TB za\u0159\u00edzen\u00ed dosahuje stabiln\u00ed propustnosti 250 MB\/s. Krom\u011b toho v\u00fdrobce slibuje, \u017ee rychlost n\u00e1hodn\u00e9ho p\u0159\u00edstupu v BarraCuda Pro by m\u011bla b\u00fdt vy\u0161\u0161\u00ed ve srovn\u00e1n\u00ed s b\u011b\u017en\u00fdmi disky pro stoln\u00ed po\u010d\u00edta\u010de, zat\u00edmco spot\u0159eba energie je naopak ni\u017e\u0161\u00ed ne\u017e u v\u011bt\u0161iny 3,5palcov\u00fdch model\u016f. Nicm\u00e9n\u011b, v\u0161echny v\u00fdroky Seagate je\u0161t\u011b prov\u011b\u0159\u00edme.<\/p>\n

Aby dos\u00e1hnout tak vysok\u00e9ho stupn\u011b hustoty dat v r\u00e1mci standardn\u00edho kolm\u00e9 z\u00e1pisu bez pou\u017eit\u00ed specializovan\u00e9 technologie SMR (Shingled Magnetic Recording), musel Seagate implementovat jednu z perspektivn\u00edch metod, o kter\u00fdch rok co rok p\u00ed\u0161eme v na\u0161ich z\u00e1v\u011bre\u010dn\u00fdch \u010dl\u00e1nc\u00edch<\/a><\/noindex>, — tzv. dvoudimenzion\u00e1ln\u00ed z\u00e1znam (Two-Dimensional Magnetic Recording). Ale navzdory sv\u00e9mu n\u00e1zvu, TDMR se nijak nevztahuje na postup z\u00e1znamu dat jako takov\u00fd a je ur\u010dena pro zv\u00fd\u0161en\u00ed pom\u011bru sign\u00e1l\/\u0161um za podm\u00ednek vysok\u00e9 hustoty stop na magnetick\u00e9 plotn\u011b d\u00edky sou\u010dasn\u00e9mu \u010dten\u00ed stopy dv\u011bma \u010dtec\u00edmi hlavami: tyto jsou rozm\u00edst\u011bny tak, \u017ee pole zachycuje sousedn\u00ed stopy, co\u017e usnad\u0148uje kompenzaci interference. V budoucnosti pevn\u00e9 disky s TDMR z\u0159ejm\u011b z\u00edskaj\u00ed je\u0161t\u011b v\u00edce hlav, a spolu s d\u016fv\u011bryhodnost\u00ed \u010dten\u00ed dat m\u016f\u017ee vzr\u016fst i jej\u00ed rychlost, ale to je zat\u00edm budoucnost.<\/p>\n

Disky BarraCuda Pro se v mnoha ohledech li\u0161\u00ed od p\u0159\u00edbuzn\u00fdch za\u0159\u00edzen\u00ed ni\u017e\u0161\u00ed \u0159ady bez p\u0159\u00eddomku Pro — za\u010d\u00ednaj\u00ed t\u00edm, \u017ee v\u0161echny standardn\u00ed desktopov\u00e9 modely pevn\u00fdch disk\u016f u v\u00fdrobc\u016f uv\u00edzly na objemu 6\u20138 TB. Disk BarraCuda Pro lze sp\u00ed\u0161e popsat jako potomka serverov\u00e9 v\u011btve Seagate, kter\u00fd postr\u00e1d\u00e1 funkce spojen\u00e9 s prac\u00ed v pol\u00edch. Ale v\u00fdsledkem je, \u017ee cena za\u0159\u00edzen\u00ed vystoupila na \u00farove\u0148 firemn\u00edch model\u016f, a to i v\u00fd\u0161e: v Rusku nelze 14TB model nal\u00e9zt levn\u011bji ne\u017e za 34 348 rubl\u016f, a na maloobchodn\u00edch tr\u017ei\u0161t\u00edch v USA za 549 USD. Dokonce ani nearline modely Seagate stejn\u00e9 kapacity stoj\u00ed m\u00e9n\u011b — od 375 USD nebo 28 936 rubl\u016f.<\/p>\n\n\n\n\n
\n\"Nov\u00fd\n<\/td>\n <\/td>\n\n\"Nov\u00fd\n<\/td>\n<\/tr>\n
\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

N\u00e1sleduj\u00edc\u00ed testovan\u00fd vzorek, 14TB disk Ultrastar DC HC530, je nearline \u00falo\u017en\u00e9 za\u0159\u00edzen\u00ed, kter\u00e9 p\u0159edstavuje to nejlep\u0161\u00ed, co mohli in\u017een\u00fd\u0159i Western Digital nab\u00eddnout, dokud se neobjevil nov\u00fd model s kapacitou 16 TB. V praxi 3DNews se stal prvn\u00edm pevn\u00fdm diskem zna\u010dky Ultrastar bez obvykl\u00fdch p\u00edsmen HGST v n\u00e1zvu: spole\u010dnost p\u0159evedla v\u0161echny serverov\u00e9 modely pod vlastn\u00ed zna\u010dku pot\u00e9, co aktiva HGST zcela splynula se slou\u010denou korporac\u00ed. Co se t\u00fd\u010de kl\u00ed\u010dov\u00fdch vlastnost\u00ed, toto za\u0159\u00edzen\u00ed je podobn\u00e9 modelu BarraCuda Pro shodn\u00e9 kapacity: uvnit\u0159 t\u011bsn\u011b uzav\u0159en\u00e9ho pouzdra Ultrastar DC HC530 se nach\u00e1z\u00ed tak\u00e9 osm magnetick\u00fdch ploten s u\u017eite\u010dnou kapacitou 1750 GB a technologie TDMR zaji\u0161\u0165uje \u010dten\u00ed dat z t\u011bsn\u011b um\u00edst\u011bn\u00fdch stop. Nicm\u00e9n\u011b z pohledu ostatn\u00edch parametr\u016f a rozmanitosti dal\u0161\u00edm funkc\u00ed typick\u00fdch pro podnikov\u00e9 HDD, nelze Ultrastar DC HC530 postavit na stejnou \u00farove\u0148 s desktopov\u00fdmi modely, i kdy\u017e BarraCuda Pro nen\u00ed typick\u00fdm z\u00e1stupcem sv\u00e9 kategorie.<\/p>\n

Tak\u017ee u\u017eite\u010dn\u00e1 hustota z\u00e1pisu na plotn\u00e1ch BarraCuda Pro a Ultrastar DC HC530 je stejn\u00e1, stejn\u011b jako ot\u00e1\u010dky v\u0159etena, ale produkt WD zaru\u010duje vy\u0161\u0161\u00ed stabiln\u00ed rychlost line\u00e1rn\u00edho \u010dten\u00ed a z\u00e1pisu dat \u2014 a\u017e 267 MB\/s (nejasn\u00e9, odkud se rozd\u00edl vzal, ale testy uk\u00e1\u017eou, zda skute\u010dn\u011b existuje). Zpo\u017ed\u011bn\u00ed p\u0159i n\u00e1hodn\u00e9m p\u0159\u00edstupu zde pom\u00e1h\u00e1 sn\u00ed\u017eit dvoustup\u0148ov\u00fd aktu\u00e1tor nov\u00e9, t\u0159et\u00ed generace a velk\u00fd buffer o velikosti 512 MB, a hlavn\u011b Media Cache \u2014 rezervn\u00ed z\u00f3ny pro rychl\u00e9 zapisov\u00e1n\u00ed blok\u016f, rozpt\u00fdlen\u00e9 po povrchu ploten. Tato posledn\u00ed vlastnost spojuje modern\u00ed nearline disky s pevn\u00fdmi disky, ve kter\u00fdch tak\u00e9 existuje prom\u011bnliv\u00fd pom\u011br mezi fyzick\u00fdmi sektory a logick\u00fdmi bloky. A od model\u016f s kapacitou 10 TB Ultrastar DC HC330 WD pou\u017e\u00edv\u00e1 pro ke\u0161ov\u00e1n\u00ed z\u00e1pisov\u00fdch operac\u00ed je\u0161t\u011b mal\u00fd objem flash pam\u011bti. V\u0161imn\u011bme si, \u017ee sou\u010dasn\u011b s (potenci\u00e1ln\u011b) extr\u00e9mn\u011b vysok\u00fdm v\u00fdkonem, kter\u00fd se mezi magnetick\u00fdmi \u00falo\u017ei\u0161ti pova\u017euje za velmi dobr\u00e9, se produkt WD vyzna\u010duje um\u00edrn\u011bnou spot\u0159ebou energie \u2014 ve skute\u010dnosti je to za\u0159\u00edzen\u00ed s nejni\u017e\u0161\u00ed spot\u0159ebou mezi v\u0161emi testovan\u00fdmi vzorky, pokud se posuzuj\u00ed podle jeho technick\u00fdch parametr\u016f.<\/p>\n

Disky tohoto typu jsou navr\u017eeny pro nep\u0159etr\u017eit\u00fd provoz v serverov\u00fdch sk\u0159\u00edn\u00edch: oboustrann\u00e9 upevn\u011bn\u00ed h\u0159\u00eddele, kompenzace rota\u010dn\u00ed vibrace \u2013 tyto a dal\u0161\u00ed konstruk\u010dn\u00ed rysy Ultrastar DC HC530 umo\u017enily zv\u00fd\u0161it projektovanou z\u00e1t\u011b\u017e disku na 550 TB\/rok, p\u0159i\u010dem\u017e doba mezi poruchami dosahuje typick\u00fdch 2,5 milionu hodin pro modely nearline. V p\u0159\u00edpad\u011b m\u00e1lo pravd\u011bpodobn\u00e9ho selh\u00e1n\u00ed p\u0159i aktualizaci firmwaru je na desce \u0159adi\u010de nainstalov\u00e1n z\u00e1lo\u017en\u00ed \u010dip. Disk se dod\u00e1v\u00e1 v modifikac\u00edch s nativn\u00edm p\u0159\u00edstupem k 4 KB sektor\u016fm nebo emulac\u00ed 512-bytov\u00fdch sektor\u016f, s rozhran\u00edm SATA nebo SAS. V posledn\u00edm p\u0159\u00edpad\u011b je tak\u00e9 dostupn\u00e1 mo\u017enost pr\u016fchoz\u00edho \u0161ifrov\u00e1n\u00ed dat.<\/p>\n

Ceny WD Ultrastar DC HC530 v konfiguraci s portem SATA a emulac\u00ed 512-bytov\u00e9ho d\u011blen\u00ed odpov\u00eddaj\u00ed \u0161pi\u010dkov\u00fdm charakteristik\u00e1m a technologi\u00edm tohoto za\u0159\u00edzen\u00ed: od 27 495 K\u010d v rusk\u00fdch internetov\u00fdch obchodech a 439 $ na \u201eAmazonu\u201c.<\/p>\n\n\n\n\n
\n\"Nov\u00fd\n<\/td>\n <\/td>\n\n\"Nov\u00fd\n<\/td>\n<\/tr>\n
\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Sestavit kolekci pevn\u00fdch disk\u016f o kapacit\u011b 14 TB pro srovn\u00e1vac\u00ed testov\u00e1n\u00ed bylo obt\u00ed\u017en\u00e9, a vhodn\u00e9 za\u0159\u00edzen\u00ed t\u0159et\u00edho v\u00fdrobce \u2013 Toshiba \u2013 jsme nakonec nez\u00edskali. M\u00edsto toho jsme dostali model ji\u017e dal\u0161\u00ed generace s kapacitou 16 TB. Nyn\u00ed v\u0161echny t\u0159i spole\u010dnosti vyr\u00e1b\u011bj\u00edc\u00ed pevn\u00e9 disky nab\u00edzej\u00ed \u00falo\u017ei\u0161t\u011b podobn\u00e9ho objemu, ale pr\u00e1v\u011b produkt Toshiba s\u00e9rie MG08 byl mezi nimi prvn\u00edm. Rekordn\u00ed \u00fasp\u011bch japonsk\u00e9 spole\u010dnosti spo\u010d\u00edv\u00e1 na plotn\u00e1ch s p\u0159ibli\u017en\u011b stejnou fyzickou hustotou z\u00e1znamu jako u pevn\u00fdch disk\u016f BarraCuda Pro a Ultrastar o 14 TB, av\u0161ak Toshiba jako prvn\u00ed dok\u00e1zala um\u00edstit dev\u011bt \u201eplacek\u201c do standardn\u00edho 3,5palcov\u00e9ho pouzdra. Neobe\u0161lo se to ani bez technologie TDMR, kter\u00e1 se stala nezbytnou podm\u00ednkou pro dosa\u017een\u00ed nov\u00fdch objemov\u00fdch mez\u00ed. Propustnost Toshiba MG08 p\u0159i operac\u00edch sekven\u010dn\u00edho \u010dten\u00ed\/z\u00e1pisu by m\u011bla b\u00fdt na \u00farovni WD Ultrastar DC HC530, ale, jak podivn\u00e9, v\u00fdrobce nezve\u0159ej\u0148uje \u017e\u00e1dn\u00e9 podrobnosti o v\u00fdkonu za\u0159\u00edzen\u00ed.<\/p>\n

Je v\u0161ak zn\u00e1mo, \u017ee spole\u010dnost Toshiba tak\u00e9 p\u0159ijala opat\u0159en\u00ed ke zv\u00fd\u0161en\u00ed spolehlivosti a z\u00e1rove\u0148 sn\u00ed\u017een\u00ed latence zapisovac\u00edch operac\u00ed: \u010dip flash pam\u011bti v modelu MG08 v p\u0159\u00edpad\u011b havarijn\u00edho vypnut\u00ed nap\u00e1jen\u00ed chr\u00e1n\u00ed data, kter\u00e1 byla odesl\u00e1na \u0159adi\u010dem hostitele k z\u00e1pisu, a soud\u011b podle v\u00fdsledk\u016f test\u016f tak\u00e9 pln\u00ed funkci druh\u00e9 \u00farovn\u011b vyrovn\u00e1vac\u00ed pam\u011bti po DRAM. Tato technologie (Persistent Write Cache) se v\u0161ak vyskytuje pouze ve specifikac\u00edch disk\u016f s emulac\u00ed 512-bajtov\u00e9ho rozd\u011blen\u00ed, kter\u00e9 p\u0159edstavuje dal\u0161\u00ed zdroj nebezpe\u010d\u00ed p\u0159i v\u00fdpadku nap\u00e1jen\u00ed (a do ur\u010dit\u00e9 m\u00edry sni\u017euje v\u00fdkon) z d\u016fvodu nutnosti prov\u00e1d\u011bt operaci read-modify-write p\u0159i ka\u017ed\u00e9m z\u00e1pisu logick\u00fdch blok\u016f, kter\u00e9 neodpov\u00eddaj\u00ed hranic\u00edm fyzick\u00fdch sektor\u016f. A p\u0159ece s\u00e9rie MG08 zahrnuje tak\u00e9 modely s nativn\u00edm p\u0159\u00edstupem k 4-kilobajtov\u00fdm sektor\u016fm. Znamen\u00e1 to, \u017ee tyto posledn\u00ed modely jsou \u00fapln\u011b zbaveny flash pam\u011bti, nebo byla jen odstran\u011bna funkce z\u00e1lohov\u00e1n\u00ed, nev\u00edme. Ale bez ohledu na PWC, Toshiba MG08, stejn\u011b jako dal\u0161\u00ed disky t\u00e9to firmy, vyu\u017e\u00edv\u00e1 algoritmy Dynamic Cache, kter\u00e9, jak tvrd\u00ed v\u00fdrobce, optim\u00e1ln\u011b rozd\u011bluj\u00ed prostor vyrovn\u00e1vac\u00ed pam\u011bti mezi operace \u010dten\u00ed a z\u00e1pisu. O n\u011bjak\u00fdch podrobn\u00fdch informac\u00edch o nich tak\u00e9 nem\u00e1me \u017e\u00e1dn\u00e9 \u00fadaje.<\/p>\n

Dal\u0161\u00edmi zdroji zv\u00fd\u0161en\u00e9 odolnosti v konstrukci Toshiba MG08 jsou uchycen\u00ed v\u0159etena ze dvou stran a senzory rotuj\u00edc\u00ed vibrace. Tyto disky jsou navr\u017eeny pro z\u00e1pis 550 TB dat ro\u010dn\u011b, maj\u00ed standardn\u00ed \u010das life time pro podnikov\u00e9 za\u0159\u00edzen\u00ed 2,5 milionu hodin a p\u011btiletou z\u00e1ruku. K objedn\u00e1n\u00ed je k dispozici n\u011bkolik r\u016fzn\u00fdch konfigurac\u00ed disku s rozhran\u00edm SATA nebo SAS a volitelnou funkc\u00ed end-to-end \u0161ifrov\u00e1n\u00ed. Co se t\u00fdk\u00e1 ceny, tu v\u00e1m bohu\u017eel nem\u016f\u017eeme poskytnout: 16TB disk Toshiba byl p\u0159edstaven ji\u017e v lednu, ale st\u00e1le z\u016fst\u00e1v\u00e1 vz\u00e1cn\u00fdm zbo\u017e\u00edm v maloobchodech.<\/p>\n

Toshiba MG08 16 TB<\/p>\n

Nyn\u00ed, kdy\u017e jsme se sezn\u00e1mili se t\u0159emi hlavn\u00edmi \u00fa\u010dastn\u00edky testov\u00e1n\u00ed, se pod\u00edv\u00e1me na tvrd\u00e9 disky s men\u0161\u00ed kapacitou, se kter\u00fdmi budeme porovn\u00e1vat nov\u00e9 modely o kapacit\u011b 14-16 terabajt\u016f. Jedn\u00edm z nich je Exos X10 s kapacitou 10 TB, co\u017e je nearline \u00falo\u017en\u00fd disk, kter\u00fd obsahuje sedm magnetick\u00fdch desek v hermetick\u00e9m krytu. A i kdy\u017e od t\u00e9 doby, co se u\u017eitn\u00e1 kapacita desky zv\u00fd\u0161ila z 1429 na 1750 GB a v\u00edce, by se m\u011bla tak\u00e9 zv\u00fd\u0161it rychlost sekven\u010dn\u00edho p\u0159\u00edstupu u pevn\u00fdch disk\u016f, Exos X10 pokud jde o tento parametr prakticky nezaost\u00e1v\u00e1 za stejnou BarraCuda Pro s kapacitou 14 TB podle specifikac\u00ed obou \u00falo\u017ei\u0161\u0165. N\u011bco nen\u00ed v specifikac\u00edch pevn\u00fdch disk\u016f Seagate zcela v po\u0159\u00e1dku, ale m\u00e1me mo\u017enost to zjistit v praxi.<\/p>\n

Aby se zv\u00fd\u0161ila rychlost operac\u00ed s n\u00e1hodn\u00fdm p\u0159\u00edstupem, v s\u00e9rii Exos existuje vysp\u011bl\u00fd mechanismus pro vyrovn\u00e1vac\u00ed pam\u011b\u0165 z\u00e1pisu AWC (Advanced Write Caching), kter\u00fd sni\u017euje dobu odezvy. V r\u00e1mci AWC jsou z\u00e1pisov\u00e9 operace skupinov\u00e1ny v DRAM vyrovn\u00e1vac\u00ed pam\u011bti, jak tomu je u jak\u00e9hokoli jin\u00e9ho pevn\u00e9ho disku, av\u0161ak vyrovn\u00e1vac\u00ed pam\u011b\u0165 uchov\u00e1v\u00e1 kopii dat pot\u00e9, co byla zaps\u00e1na na desku, a obsah zrcadlov\u00e9 vyrovn\u00e1vac\u00ed pam\u011bti m\u016f\u017ee b\u00fdt okam\u017eit\u011b p\u0159e\u010dten hostitelsk\u00fdm \u0159adi\u010dem. V serverov\u00fdch pevn\u00fdch disc\u00edch Seagate<\/a><\/noindex> 2,5-palcov\u00fd form\u00e1t AWC zahrnuje dal\u0161\u00ed rychlostn\u00ed \u00farove\u0148 \u2013 vyhrazen\u00e9 oblasti na povrchu disk\u016f, kam se data z DRAM zapisuj\u00ed v sekven\u010dn\u00edm \u0159adu (Media Cache), a tak\u00e9 mal\u00fd objem nevolatile pam\u011bti pro z\u00e1chranu dat z vyrovn\u00e1vac\u00ed pam\u011bti p\u0159i n\u00e1hl\u00e9m v\u00fdpadku nap\u00e1jen\u00ed. Ale v Exos X10 chyb\u00ed flash pam\u011b\u0165, mo\u017en\u00e1 i Media Cache spolu s n\u00ed.<\/p>\n

Disky s\u00e9rie Exos se li\u0161\u00ed od spot\u0159ebitelsk\u00fdch pevn\u00fdch disk\u016f pro stoln\u00ed po\u010d\u00edta\u010de a NAS sv\u00fdmi vysok\u00fdmi hodnotami pracovn\u00ed doby mezi poruchami (2,5 milionu hodin) a vypo\u010d\u00edtan\u00fdm zat\u00ed\u017een\u00edm (550 TB\/rok), mo\u017enosti provozu v serverov\u00e9m racku bez omezen\u00ed po\u010dtu p\u0159ihr\u00e1dek, a tak\u00e9 p\u011btiletou z\u00e1rukou. Pevn\u00fd disk s modelov\u00fdm \u010d\u00edslem ST10000NM0016, kter\u00fd jsme testovali, nav\u00edc pat\u0159\u00ed k Hyperscale-modifikac\u00edm, je\u017e maj\u00ed sn\u00ed\u017eenou spot\u0159ebu energie ve srovn\u00e1n\u00ed s ostatn\u00edmi \u010dleny rodiny Exos, ale jsou vyr\u00e1b\u011bny pouze s rozhran\u00edm SATA a emulac\u00ed 512-bytov\u00fdch sektor\u016f. V konfigurac\u00edch s konektorem SAS mezi modely Exos existuj\u00ed varianty s nativn\u00edm p\u0159\u00edstupem k 4-kilobajtov\u00fdm sektor\u016fm a tak\u00e9 s funkc\u00ed end-to-end pln\u00e9ho \u0161ifrov\u00e1n\u00ed disku.<\/p>\n\n\n\n\n
\n\"Nov\u00fd\n<\/td>\n <\/td>\n\n\"Nov\u00fd\n<\/td>\n<\/tr>\n
\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Pevn\u00fd disk Seagate IronWolf se ned\u00e1vno objevil v na\u0161em p\u0159ehledu<\/a><\/noindex> nov\u00fdch z\u00e1stupc\u016f t\u00e9to zna\u010dky spolu s SSD Seagate pro s\u00ed\u0165ov\u00e9 \u00falo\u017ei\u0161t\u011b. 12TB model IronWolf se z\u0159ejm\u011b dod\u00e1v\u00e1 s disky se stejnou fyzickou hustotou z\u00e1pisu jako Exos X10, jen je zde jeden disk nav\u00edc. Nicm\u00e9n\u011b Seagate odhaduje v\u00fdkon sv\u00e9ho v\u00fdrobku v sekven\u010dn\u00edch \u010dtec\u00edch a zapisovac\u00edch operac\u00edch mnohem n\u00ed\u017ee \u2013 pouze 210 MB\/s. A \u017e\u00e1dn\u00e9 rafinovan\u00e9 technologie, kter\u00e9 by kompenzovaly vysokou latenci odezvy, typickou pro magnetick\u00e9 disky, tady tak\u00e9 nejsou.<\/p>\n

Zato v\u0161echny pevn\u00e9 disky IronWolf, po\u010d\u00ednaje objemem 4 TB, p\u0159evzaly od s\u00e9rie Exos n\u011bkter\u00e9 hardwarov\u00e9 vlastnosti, kter\u00e9 p\u0159isp\u00edvaj\u00ed k vy\u0161\u0161\u00ed odolnosti proti poruch\u00e1m. Blok magnetick\u00fdch disk\u016f ka\u017ed\u00e9ho pevn\u00e9ho disku je vyv\u00e1\u017een ve dvou rovin\u00e1ch a senzory ot\u00e1\u010div\u00e9 vibrace zaji\u0161\u0165uj\u00ed stabiln\u00ed provoz ve stojanov\u00e9m SDD nebo samostatn\u00e9m NAS s po\u010dtem diskov\u00fdch p\u0159ihr\u00e1dek a\u017e do osmi. IronWolf je ur\u010den pro m\u00edrn\u00e9 provozn\u00ed re\u017eimy s projektovanou z\u00e1t\u011b\u017e\u00ed 180 TB\/rok a vyzna\u010duje se pr\u016fm\u011brnou dobou mezi poruchami 1 milion hodin. V d\u016fsledku toho je tak\u00e9 doba z\u00e1ruky u IronWolf krat\u0161\u00ed ne\u017e u v\u00e1\u017en\u011bj\u0161\u00edch model\u016f v katalogu Seagate \u2013 t\u0159i roky.<\/p>\n\n\n\n\n
\n\"Nov\u00fd\n<\/td>\n <\/td>\n\n\"Nov\u00fd\n<\/td>\n<\/tr>\n
\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Pod zna\u010dkou S300 japonsk\u00e1 spole\u010dnost Toshiba vydala s\u00e9rii disk\u016f pro syst\u00e9my videonahr\u00e1v\u00e1n\u00ed \u2013 t\u011bmto pevn\u00fdm disk\u016fm je tak\u00e9 v\u011bnov\u00e1na vlastn\u00ed pozornost. p\u0159ehled<\/a><\/noindex> na str\u00e1nk\u00e1ch 3DNews. D\u00edky roz\u0161\u00ed\u0159en\u00ed protokolu p\u0159enosu dat ATA Streaming Command Set star\u0161\u00ed modely Toshiba S300 zaru\u010duj\u00ed sou\u010dasn\u00e9 nahr\u00e1v\u00e1n\u00ed videa ze 64 kamer, ale v podstat\u011b se jedn\u00e1 o typick\u00e9 \u00falo\u017ei\u0161t\u011b pro NAS a DAS s mo\u017enost\u00ed provozu 24\/7 a slu\u0161nou \u017eivotnost\u00ed: podobn\u011b jako u IronWolf je \u017eivotnost 1 milion hodin, a z\u00e1ruka z\u016fst\u00e1v\u00e1 stejn\u00e1 - t\u0159i roky. D\u00edky konstruk\u010dn\u00edm p\u0159ednostem \u0161asi S300 - upevn\u011bn\u00ed v\u0159etena z obou stran a aktivn\u00ed kompenzaci rota\u010dn\u00ed vibrace - je povolena instalace v\u00edce ne\u017e osmi takov\u00fdch za\u0159\u00edzen\u00ed do jedn\u00e9 stojanov\u00e9 police nebo samostatn\u011b stoj\u00edc\u00edho NAS.<\/p>\n

Model S300, vybran\u00fd pro srovn\u00e1n\u00ed s novinkami s kapacitou 14-16 TB, je zalo\u017een na hardwarov\u00e9m \u0161asi serverov\u00fdch disk\u016f MD06ACA-V a obsahuje sedm magnetick\u00fdch pl\u00e1t\u016f, p\u0159i\u010dem\u017e ve specifikac\u00edch za\u0159\u00edzen\u00ed je uvedena typick\u00e1 rychlost n\u00e1hodn\u00e9ho \u010dten\u00ed\/z\u00e1pisu pro modern\u00ed vysokokapacitn\u00ed HDD 248 MB\/s. Z t\u011bch metod, kter\u00e9 Toshiba vyu\u017e\u00edv\u00e1 u serverov\u00fdch pevn\u00fdch disk\u016f ke sn\u00ed\u017een\u00ed latence, S300 zachov\u00e1v\u00e1 pouze funkci Dynamic Cache.<\/p>\n

Na rozd\u00edl od v\u0161ech ostatn\u00edch \u00fa\u010dastn\u00edk\u016f testov\u00e1n\u00ed, S300 i p\u0159i t\u011bsn\u00e9 sad\u011b ze sedmi desti\u010dek obejde bez helia a je vyroben v standardn\u00edm ventila\u010dn\u00edm krytu. Zd\u00e1 se, \u017ee pr\u00e1v\u011b z tohoto d\u016fvodu m\u00e1 10TB model nejvy\u0161\u0161\u00ed hodnotu spot\u0159eby energie v souhrnn\u00e9 tabulce specifikac\u00ed \u00fa\u010dastn\u00edk\u016f testov\u00e1n\u00ed, a tento parametr, i kdy\u017e s\u00e1m o sob\u011b d\u016fle\u017eit\u00fd pouze pro administr\u00e1tory datov\u00fdch center, p\u0159\u00edmo ur\u010duje teplotu HDD. Skute\u010dnou spot\u0159ebu energie S300 si je\u0161t\u011b ov\u011b\u0159\u00edme sami, ale prozat\u00edm si tento bod vezmeme na v\u011bdom\u00ed.<\/p>\n\n\n\n\n
\n\"Nov\u00fd\n<\/td>\n <\/td>\n\n\"Nov\u00fd\n<\/td>\n<\/tr>\n
\n<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n

Zdroj: 3dnews.ru<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"

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