{"id":34884,"date":"2019-10-31T22:01:01","date_gmt":"2019-10-31T19:01:01","guid":{"rendered":"https:\/\/prohoster.info\/blog\/upgrade-diskovoj-podsistemy-starogo-servera-s-shinoj-pcie-1-0-2-0\/"},"modified":"2019-10-31T22:01:01","modified_gmt":"2019-10-31T19:01:01","slug":"upgrade-diskovoj-podsistemy-starogo-servera-s-shinoj-pcie-1-0-2-0","status":"publish","type":"post","link":"https:\/\/prohoster.info\/it\/blog\/administrirovanie\/upgrade-diskovoj-podsistemy-starogo-servera-s-shinoj-pcie-1-0-2-0","title":{"rendered":"Aggiornamento del subsistema disco di un vecchio server con bus PCIe 1.0 \u2014 2.0","gt_translate_keys":[{"key":"rendered","format":"text"}]},"content":{"rendered":"<p><img decoding=\"async\" alt=\"Aggiornamento del subsistema disco di un vecchio server con bus PCIe 1.0 \u2014 2.0\" src=\"\/wp-content\/uploads\/2019\/06\/68025340a72b1acac62371764f328712.jpg\" style=\"display:block;margin: 0 auto;\" \/><b class=\"spoiler_title\">Perch\u00e9 il tema di questo articolo \u00e8 l'upgrade del sistema di archiviazione<\/b>\u00c8 chiaro che, in primo luogo, \u00e8 necessario generalmente:<\/p>\n<ol>\n<li>Aumentare la RAM. \u00c8 cos\u00ec ovvio che non ho ritenuto necessario scriverne nella parte principale dell'articolo.<\/li>\n<li>Installare un ulteriore processore(e) o sostituire entrambi i processori con versioni pi\u00f9 performanti supportate dai socket del server.<\/li>\n<\/ol>\n<p>\nPer i server pi\u00f9 vecchi, sia la memoria che i processori possono spesso essere trovati a prezzi stracciati.<\/p>\n<p>A un certo punto, ogni proprietario di un server si trova di fronte a una domanda: upgrade o nuovo server.<\/p>\n<p>Poich\u00e9 il costo di un nuovo server pu\u00f2 ora toccare milioni di rubli, molti scelgono la via dell'upgrade.<\/p>\n<p>Per un upgrade riuscito, \u00e8 molto importante utilizzare compromessi, in modo da ottenere un sostanziale aumento delle prestazioni a un prezzo contenuto (rispetto al costo di un nuovo server).<\/p>\n<p>L'articolo presenta un elenco di SSD server PCI-E 2.0 x8, che ora sono notevolmente pi\u00f9 economici, sono indicati i controller RAID con supporto per la cache SSD e un SSD SATA III testato sull'interfaccia SATA II.<br \/>\n<noindex><a rel=\"nofollow\" name=\"habracut\"><\/a><\/noindex><br \/>\nIl modo pi\u00f9 ovvio per aggiornare il sistema di archiviazione \u00e8 passare da HDD a SSD. Questo vale sia per i laptop che per i server. Nei server, la differenza \u00e8 principalmente che gli SSD possono essere facilmente configurati in RAID.<\/p>\n<p>Ci sono, per\u00f2, alcune questioni delicate legate al fatto che un vecchio server potrebbe non avere porte SATA III e in tal caso sar\u00e0 necessario sostituirlo o installare un controller adeguato.<\/p>\n<p>Ci sono, ovviamente, anche soluzioni intermedie.<\/p>\n<h2>Caching su SSD.<\/h2>\n<p>\nIn generale, questo metodo \u00e8 abbastanza adatto per database, 1C e accessi casuali. La velocit\u00e0 aumenta realmente. Per file di grandi dimensioni o sorveglianza video, questo metodo \u00e8 inutile.<\/p>\n<h3>Controller RAID LSI (IBM, DELL, CISCO, Fujitsu)<\/h3>\n<p>\nA partire dalla serie 92xx, LSI ha sviluppato la tecnologia CacheCade 2.0, che consente di utilizzare quasi qualsiasi SSD SATA come cache per il RAID. Sia in lettura che in scrittura. \u00c8 anche possibile creare uno specchio utilizzando SSD di caching.<\/p>\n<p>Con i controller brandizzati, la situazione \u00e8 diventata pi\u00f9 complessa. Questo \u00e8 particolarmente vero per IBM. Le chiavi e gli SSD per CacheCade devono essere acquistati da IBM a prezzi elevati, quindi \u00e8 pi\u00f9 semplice sostituire il controller con uno LSI e acquistare una chiave hardware a prezzo ridotto. Le chiavi software costano significativamente di pi\u00f9 rispetto a quelle hardware.<\/p>\n<h3>Controller RAID Adaptec<\/h3>\n<p>\nI controller Adaptec dispongono della tecnologia MaxCache, che consente anche di utilizzare SSD come cache. Ci interessano le versioni dei controller che terminano con la lettera Q.<\/p>\n<p>I controller Q possono utilizzare quasi qualsiasi SSD, non solo quelli forniti da Adaptec.<\/p>\n<ul>\n<li>A partire dal 5xxx, tutti i controller supportano Hybrid RAID. La sostanza di questa tecnologia \u00e8 che la lettura avviene sempre da SSD, quando uno dei dischi in mirror \u00e8 un SSD.<\/li>\n<li>5xxxQ, ad esempio 5805ZQ. Questi controller supportano MaxCache 1.0. Solo caching in lettura.<\/li>\n<li>6xxQ, ad esempio 6805Q. MaxCache 2.0. Caching in lettura e scrittura.<\/li>\n<li>7xxQ, ad esempio 7805Q. MaxCache 3.0. Caching in lettura e scrittura.<\/li>\n<li>8xxQ per scopi di aggiornamento ha poco senso da utilizzare a causa dei prezzi elevati.<\/li>\n<\/ul>\n<p>\n<noindex><a rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/company\/pc-administrator\/blog\/319214\/\">Articolo sul caching su SSD su Habr (controller e OS).<\/a><\/noindex><\/p>\n<h3>Tecnologie software di caching su SSD<\/h3>\n<p>\nNon approfondir\u00f2 queste tecnologie. Attualmente sono supportate praticamente da qualsiasi sistema operativo. Ricordo che, utilizzando btrfs, reindirizza automaticamente le richieste di lettura al dispositivo con la coda pi\u00f9 corta \u2014 SSD.<\/p>\n<h2>SSD SATA III su interfaccia SATA II<\/h2>\n<p>\nPoich\u00e9 non sempre ci sono opportunit\u00e0 e fondi per un nuovo controllore, emerge la domanda su quanto bene funzionino gli SSD SATA III su un'interfaccia obsoleta SATA II.<\/p>\n<p>Effettueremo un piccolo test. Il soggetto del test sar\u00e0 un SSD SATA III Intel S3710 da 400 GB.<\/p>\n<p>Lettura casuale, iops<br \/>\nLatenza media di lettura, mS<br \/>\nScrittura casuale, iops<br \/>\nLatenza media di scrittura, mS<br \/>\nLettura lineare, MB\/s<br \/>\nScrittura lineare, MB\/s<\/p>\n<p>SATA II<br \/>\n21241<br \/>\n2<br \/>\n13580<br \/>\n4<br \/>\n282<br \/>\n235<\/p>\n<p>SATA III<br \/>\n68073<br \/>\n0.468<br \/>\n61392<br \/>\n0.52<br \/>\n514<br \/>\n462<\/p>\n<p>\n<b class=\"spoiler_title\">Comandi utilizzati per testare la velocit\u00e0<\/b><\/p>\n<pre><code class=\"bash\">fio --name LinRead --eta-newline=5s --filename=\/dev\/sda --rw=read --size=500m --io_size=10g --blocksize=1024k --ioengine=libaio --iodepth=32 --direct=1 --numjobs=1 --runtime=60 --group_reporting \nfio --name LinWrite --eta-newline=5s --filename=\/dev\/sda --rw=write --size=500m --io_size=10g --blocksize=1024k --ioengine=libaio --fsync=10000 --iodepth=32 --direct=1 --numjobs=1 --runtime=60 --group_reporting\n\nfio --name RandRead --eta-newline=5s --filename=\/dev\/sda --rw=randread --size=500m --io_size=10g --blocksize=4k --ioengine=libaio --iodepth=32 --direct=1 --numjobs=4 --runtime=60 --group_reporting\n\nfio --name RandWrite --eta-newline=5s --filename=\/dev\/sda --rw=randwrite --size=500m --io_size=10g --blocksize=4k --ioengine=libaio --iodepth=32 --direct=1 --numjobs=4 --runtime=60 --group_reporting\n<\/code><\/pre>\n<p>Come si pu\u00f2 notare, la differenza in termini di velocit\u00e0 lineare, IOPS e latenze \u00e8 piuttosto significativa, dunque ha senso utilizzare solo l'interfaccia SATA III; se non \u00e8 disponibile, \u00e8 consigliabile installare un controller.<\/p>\n<p>A dire il vero, posso affermare che per <noindex><a rel=\"nofollow\" href=\"http:\/\/www.thg.ru\/storage\/ustanovka_ssd_v_sistemu_s_sata_3_gbits_test\/ustanovka_ssd_v_sistemu_s_sata_3_gbits_test-01.html\">altri esperimenti<\/a><\/noindex> la differenza in velocit\u00e0 di lettura e scrittura casuale si \u00e8 rivelata trascurabile. \u00c8 possibile che un tale grande scarto negli IOPS tra SATA II e SATA III sia dovuto al fatto che avevo un controller SATA II particolarmente poco performante o un driver con alcune problematiche.<\/p>\n<p>Tuttavia, \u00e8 un dato di fatto che \u00e8 necessario controllare la velocit\u00e0 di SATA II, nel caso in cui avete un controller altrettanto lento. In questo caso, \u00e8 obbligatorio passare a un controller SATA III.<\/p>\n<h2>SSD PCIe su bus PCI-e 2.0 o 1.0<\/h2>\n<p>\nCome \u00e8 noto, gli SSD pi\u00f9 veloci sono quelli PCI-e NVMe, che non sono limitati dai protocolli SAS o SATA.<\/p>\n<p>Tuttavia, quando si installano moderni SSD PCI-e, bisogna considerare che la maggior parte di essi utilizza solo 4 linee PCI-e, generalmente PCI-e 3.0 o 3.1.<\/p>\n<p>E ora diamo un'occhiata alla tabella delle velocit\u00e0 del bus PCI-e.<\/p>\n<p>Larghezza di banda PCI Express, GB\/s<\/p>\n<p>Anno <br \/>\n rilascio<\/p>\n<p>Versione<br \/>\nPCI Express<\/p>\n<p>Codifica<\/p>\n<p>Velocit\u00e0<br \/>\ntrasmissione<\/p>\n<p>Larghezza di banda per x linee<\/p>\n<p>\u00d74<br \/>\n\u00d78<br \/>\n\u00d716<\/p>\n<p>2002<br \/>\n1.0<br \/>\n8b\/10b<\/p>\n<p>0.50 GB\/s<br \/>\n1.0 GB\/s<br \/>\n2.0 GB\/s<br \/>\n4.0 GB\/s<\/p>\n<p>2007<br \/>\n2.0<br \/>\n8b\/10b<\/p>\n<p>1.0 GB\/s<br \/>\n2.0 GB\/s<br \/>\n4.0 GB\/s<br \/>\n8.0 GB\/s<\/p>\n<p>2010<br \/>\n3.0<br \/>\n128b\/130b<\/p>\n<p>1,97 GB\/s<br \/>\n3,94 GB\/s<br \/>\n7,88 GB\/s<br \/>\n15,8 GB\/s<\/p>\n<p>Quando si installa un SSD PCI 3.0 x4 nello slot PCI-e 2.0, funzioner\u00e0 con lo stesso numero di linee ma a una velocit\u00e0 significativamente inferiore. Il problema \u00e8 che le velocit\u00e0 lineari degli SSD PCI-e moderni superano la capacit\u00e0 della larghezza di banda dello slot PCI-e 2.0 e, tanto pi\u00f9, di PCI-e 1.0.<\/p>\n<h3>SSD M.2 e adattatore PCI-e<\/h3>\n<p>Ci sono buone opzioni di aggiornamento, quando acquistiamo un adattatore da 10 dollari e installiamo un SSD M.2 nel server, ma ancora una volta, per buoni SSD ci sar\u00e0 una riduzione delle velocit\u00e0 (soprattutto su PCI-e 1.0), e gli SSD M.2 non sempre sono pronti per i carichi di lavoro server: hanno una grande resistenza all'usura, protezione dell'alimentazione e stabilit\u00e0 delle prestazioni a causa dell'occupazione della cache SLC nei modelli pi\u00f9 economici.<\/p>\n<p>Quindi, questo metodo pu\u00f2 essere adatto solo per server con slot PCI-e 2.0 e attivit\u00e0 non critiche.<\/p>\n<h3>SSD PCI-E 2.0 x8<\/h3>\n<p>\nL'aggiornamento pi\u00f9 economicamente logico \u00e8 l'uso di SSD PCI-E 2.0 x8 per server con slot PCI-e 1.0 (larghezza di banda fino a 2 GB\/s) e PCI-e 2.0 (fino a 4 GB\/s).<\/p>\n<p>SSD di questo tipo per server possono essere acquistati a prezzi molto convenienti sia su vari marketplace che su aste online, compresa la Russia.<\/p>\n<p>Ho creato una tabella di SSD ormai obsoleti che possono dare nuova vita al tuo vecchio server. Alla fine della tabella, ho aggiunto alcuni SSD con interfaccia PCI-E 3.0 x8. Magari riesci a trovarli a un prezzo ragionevole.<\/p>\n<p>Nome<br \/>\nTB<br \/>\nPBW<br \/>\nPCI-E<br \/>\n4k read iops, K<br \/>\n4k write iops, K<br \/>\nread, MB\/s<br \/>\nwrite, MB\/s<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.storagereview.com\/fusionio_iodrive2_duo_mlc_application_accelerator_review\">Fusion-io ioDrive II DUO MLC<\/a><\/noindex><br \/>\n2.4<br \/>\n32.5<br \/>\n2.0 x8<br \/>\n480<br \/>\n490<br \/>\n3000<br \/>\n2500<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.sandisk.com\/content\/dam\/sandisk-main\/en_us\/assets\/resources\/enterprise\/data-sheets\/fusion-iomemory-sx350-pcie-application-accelerators-datasheet.pdf\">SANDISK FUSION IOMEMORY SX350-1300<\/a><\/noindex><br \/>\n1.3<br \/>\n4<br \/>\n2.0 x8<br \/>\n225<br \/>\n345<br \/>\n2800<br \/>\n1300<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.storagereview.com\/fusion_iomemory_px600_review\">SANDISK FUSION IOMEMORY PX600-1300<\/a><\/noindex><br \/>\n1.3<br \/>\n16<br \/>\n2.0 x8<br \/>\n235<br \/>\n375<br \/>\n2700<br \/>\n1700<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.sandisk.com\/content\/dam\/sandisk-main\/en_us\/assets\/resources\/enterprise\/data-sheets\/fusion-iomemory-sx350-pcie-application-accelerators-datasheet.pdf\">SANDISK FUSION IOMEMORY SX350-1600<\/a><\/noindex><br \/>\n1.6<br \/>\n5.5<br \/>\n2.0 x8<br \/>\n270<br \/>\n375<br \/>\n2800<br \/>\n1700<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.storagereview.com\/fusion_iomemory_sx300_review\">SanDisk Fusion ioMemory SX300-3200<\/a><\/noindex><br \/>\n3.2<br \/>\n11<br \/>\n2.0 x8<br \/>\n345<br \/>\n385<br \/>\n2700<br \/>\n2200<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.sandisk.com\/content\/dam\/sandisk-main\/en_us\/assets\/resources\/enterprise\/data-sheets\/fusion-iomemory-sx350-pcie-application-accelerators-datasheet.pdf\">SanDisk Fusion ioMemory SX350-3200<\/a><\/noindex><br \/>\n3.2<br \/>\n11<br \/>\n2.0 x8<br \/>\n345<br \/>\n385<br \/>\n2800<br \/>\n2200<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.storagereview.com\/fusion_iomemory_px600_review\">SANDISK FUSION IOMEMORY PX600<\/a><\/noindex><br \/>\n2.6<br \/>\n32<br \/>\n2.0 x8<br \/>\n350<br \/>\n385<br \/>\n2700<br \/>\n2200<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/support.huawei.com\/enterprise\/en\/doc\/EDOC1000052593?section=j005\">Huawei ES3000 V2<\/a><\/noindex><br \/>\n1,6<br \/>\n8,76<br \/>\n2.0 x8<br \/>\n395<br \/>\n270<br \/>\n1550<br \/>\n1100<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/support.huawei.com\/enterprise\/en\/doc\/EDOC1000052593?section=j005\">Huawei ES3000 V2<\/a><\/noindex><br \/>\n3,2<br \/>\n17,52<br \/>\n2.0 x8<br \/>\n770<br \/>\n230<br \/>\n3100<br \/>\n2200<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.emc.com\/collateral\/data-sheet\/h11411-xtremsf-ds.pdf\">EMC XtremSF<\/a><\/noindex><br \/>\n2,2<br \/>\n\u00a0<br \/>\n2.0 x8<br \/>\n340<br \/>\n110<br \/>\n2700<br \/>\n1000<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.storagereview.com\/virident_flashmax_ii_mlc_application_accelerator_review_22tb\">HGST Virident FlashMAX II<\/a><\/noindex><br \/>\n2,2<br \/>\n33<br \/>\n2.0 x8<br \/>\n350<br \/>\n103<br \/>\n2700<br \/>\n1000<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/documents.westerndigital.com\/\/content\/dam\/doc-library\/en_us\/assets\/public\/western-digital\/product\/hgst\/general-docs\/data-sheet-flashmax-pcie.pdf\">HGST Virident SSD FlashMAX II<\/a><\/noindex><br \/>\n4,8<br \/>\n10.1<br \/>\n2.0 x8<br \/>\n269<br \/>\n51<br \/>\n2600<br \/>\n900<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/documents.westerndigital.com\/\/content\/dam\/doc-library\/en_us\/assets\/public\/western-digital\/product\/hgst\/general-docs\/data-sheet-flashmax-pcie.pdf\">HGST Virident FlashMAX III<\/a><\/noindex><br \/>\n2,2<br \/>\n7.1<br \/>\n2.0 x8<br \/>\n531<br \/>\n59<br \/>\n2700<br \/>\n1400<\/p>\n<p>Dell Micron P420M<br \/>\n1.4<br \/>\n9.2<br \/>\n2.0 x8<br \/>\n750<br \/>\n95<br \/>\n3300<br \/>\n630<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.storagereview.com\/micron_p420m_enterprise_pcie_ssd_review\">Micron P420M<\/a><\/noindex><br \/>\n1.4<br \/>\n9.2<br \/>\n2.0 x8<br \/>\n750<br \/>\n95<br \/>\n3300<br \/>\n630<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.anandtech.com\/show\/10890\/hgst-ultrastar-sn200-accelerator-768-tb-capacity-61-gbs-read-speed-12m-iops\">HGST SN260<\/a><\/noindex><br \/>\n1.6<br \/>\n25.10<br \/>\n3.0 x8<br \/>\n1200<br \/>\n200<br \/>\n6170<br \/>\n2200<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.anandtech.com\/show\/10890\/hgst-ultrastar-sn200-accelerator-768-tb-capacity-61-gbs-read-speed-12m-iops\">HGST SN260<\/a><\/noindex><br \/>\n3,2<br \/>\n17,52<br \/>\n3.0 x8<br \/>\n1200<br \/>\n200<br \/>\n6170<br \/>\n2200<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/ark.intel.com\/content\/www\/ru\/ru\/ark\/products\/88731\/intel-ssd-dc-p3608-series-1-6tb-1-2-height-pcie-3-0-x8-20nm-mlc.html\">Intel P3608<\/a><\/noindex><br \/>\n3,2<br \/>\n17,5<br \/>\n3.0 x8<br \/>\n850<br \/>\n80<br \/>\n4500<br \/>\n2600<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.kingston.com\/datasheets\/DCP1000_us.pdf\">Kingston DCP1000<\/a><\/noindex><br \/>\n3,2<br \/>\n2,78<br \/>\n3.0 x8<br \/>\n1000<br \/>\n180<br \/>\n6800<br \/>\n6000<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/docs.oracle.com\/cd\/E65386_01\/html\/E65387\/gokdw.html#scrolltoc\">Oracle F320<\/a><\/noindex><br \/>\n3.2<br \/>\n29<br \/>\n3.0 x8<br \/>\n750<br \/>\n120<br \/>\n5500<br \/>\n1800<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.samsung.com\/semiconductor\/global.semi.static\/PM1725_NVMe_PCIe_SSD_Samsung_2016-1.pdf\">Samsung PM1725<\/a><\/noindex><br \/>\n3.2<br \/>\n29<br \/>\n3.0 x8<br \/>\n1000<br \/>\n120<br \/>\n6000<br \/>\n2000<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.samsung.com\/semiconductor\/ssd\/enterprise-ssd\/MZPLL3T2HMLS\/\">Samsung PM1725a<\/a><\/noindex><br \/>\n3.2<br \/>\n29<br \/>\n3.0 x8<br \/>\n1000<br \/>\n180<br \/>\n6200<br \/>\n2600<\/p>\n<p><noindex><a rel=\"nofollow\" href=\"https:\/\/www.samsung.com\/semiconductor\/ssd\/enterprise-ssd\/MZPLL3T2HAJQ\/\">Samsung PM1725b<\/a><\/noindex><br \/>\n3.2<br \/>\n18<br \/>\n3.0 x8<br \/>\n980<br \/>\n180<br \/>\n6200<br \/>\n2600<\/p>\n<p>\n<img decoding=\"async\" alt=\"Aggiornamento del subsistema disco di un vecchio server con bus PCIe 1.0 \u2014 2.0\" src=\"\/wp-content\/uploads\/2019\/06\/369c72c6f028b915a199e85fc3de3819.jpg\" style=\"display:block;margin: 0 auto;\" \/>Tra questi SSD, i Fusion ioMemory si distinguono. Il direttore scientifico <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/Fusion-io\">Fusion<\/a><\/noindex> sia <noindex><a rel=\"nofollow\" href=\"https:\/\/ru.wikipedia.org\/wiki\/%D0%92%D0%BE%D0%B7%D0%BD%D1%8F%D0%BA,_%D0%A1%D1%82%D0%B8%D0%B2\">Steve Wozniak<\/a><\/noindex>. Questa azienda \u00e8 stata poi acquisita da SanDisk per 1,2 miliardi di dollari. Un paio di anni fa costavano oltre 50.000 dollari ciascuno. Oggi possono essere trovati a poche centinaia di dollari per dischi da 1TB e oltre.<\/p>\n<p>Se guardi attentamente la tabella, noterai che hanno un numero di IOPS in scrittura molto elevato, praticamente pari a quello in lettura. Considerando il loro attuale prezzo, ritengo che questi SSD meritino attenzione. <\/p>\n<p>Tuttavia, hanno alcune peculiarit\u00e0:<\/p>\n<ol>\n<li>Non possono essere avviabili.<\/li>\n<li>\u00c8 necessario un driver per l'utilizzo. I driver sono disponibili praticamente per tutto, ma per le versioni pi\u00f9 recenti di Linux sar\u00e0 necessario compilarli.<\/li>\n<li>La dimensione ottimale del settore \u00e8 di 4096 byte. (Anche 512 \u00e8 supportato)<\/li>\n<li>In uno scenario peggiore, il driver pu\u00f2 consumare parecchia RAM (con una dimensione del settore di 512 byte)<\/li>\n<li>La velocit\u00e0 di funzionamento dipende dalla potenza del processore, quindi \u00e8 meglio disattivare le tecnologie di risparmio energetico. Questo \u00e8 sia un vantaggio che uno svantaggio, in quanto con un processore potente il dispositivo pu\u00f2 funzionare anche pi\u00f9 velocemente di quanto indicato nelle specifiche.<\/li>\n<li>Richiede un buon raffreddamento. Per i server, questo non dovrebbe essere un problema.<\/li>\n<li>Non raccomandato per ESXi, poich\u00e9 ESXi preferisce dischi con settore 512N, il che potrebbe comportare un elevato consumo di memoria per il driver.<\/li>\n<li>Le versioni marchiate di questi SSD non sono generalmente supportate dai fornitori fino all'ultimo driver da SanDisk (marzo 2019).<\/li>\n<\/ol>\n<p>\nHo effettuato test di Fusion ioMemory confrontandolo con un SSD serverpiuttosto moderno Intel P3700 PCI-E 3.0 x8 (quest'ultimo costa quattro volte di pi\u00f9 del Fusion con capacit\u00e0 simile). Inoltre, si pu\u00f2 vedere quanto la velocit\u00e0 venga ridotta a causa del bus x4.<\/p>\n<p>Fusion PX600 1.3TB PCI-E 2.0 x8<br \/>\nIntel P3700 1.6TB PCI-E 3.0 x4<\/p>\n<p><img decoding=\"async\" alt=\"Aggiornamento del subsistema disco di un vecchio server con bus PCIe 1.0 \u2014 2.0\" src=\"\/wp-content\/uploads\/2019\/06\/7157ec6e43cac87fc0cdf5dd2887cfac.jpg\" style=\"display:block;margin: 0 auto;\" \/><br \/>\n<img decoding=\"async\" alt=\"Aggiornamento del subsistema disco di un vecchio server con bus PCIe 1.0 \u2014 2.0\" src=\"\/wp-content\/uploads\/2019\/06\/f5db5f37b300332bd787d5b2fe57b67e.jpg\" style=\"display:block;margin: 0 auto;\" \/><\/p>\n<p>\nS\u00ec, la velocit\u00e0 di lettura sequenziale \u00e8 decisamente limitata per l'Intel P3700. Secondo la scheda tecnica dovrebbe essere di 2800 MB\/s, ma noi otteniamo solo 1469 MB\/s. Anche se in generale si pu\u00f2 dire che, con un bus PCI-e 2.0, \u00e8 possibile utilizzare SSD server PCI-E 3.0 x4, se si riescono a reperire a un prezzo ragionevole.<\/p>\n<h3>Conclusioni<\/h3>\n<p>\nIl sistema di archiviazione del vecchio server con bus PCI-E 1.0 o 2.0 pu\u00f2 essere potenziato utilizzando SSD in grado di sfruttare 8 linee PCI-E, che offrono una larghezza di banda fino a 4 GB\/s (PCI-E 2.0) o 2 GB\/s (PCI-E 1.0). \u00c8 economicamente pi\u00f9 vantaggioso utilizzare SSD PCI-E 2.0, che sono considerati tecnicamente obsoleti.<\/p>\n<p>Esistono anche soluzioni compromissorie semplici da implementare, come l'acquisto della chiave CacheCade per i controller LSI o la sostituzione del controller Adaptec con la versione Q.<\/p>\n<p>E un'opzione completamente banale \u00e8 acquistare un controller RAID SATA III affinch\u00e9 gli SSD funzionino alla massima velocit\u00e0, gestendo tutto ci\u00f2 che richiede velocit\u00e0.<br \/>\n<br \/>Fonte: <a content=\"nofollow\" rel=\"nofollow\" href=\"https:\/\/habr.com\/ru\/post\/454222\/\">habr.com<\/a><\/p>","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"excerpt":{"rendered":"<p>\u041f\u043e\u0447\u0435\u043c\u0443 \u0442\u0435\u043c\u043e\u0439 \u0434\u0430\u043d\u043d\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0438 \u0432\u044b\u0431\u0440\u0430\u043d \u0430\u043f\u0433\u0440\u0435\u0439\u0434 \u0434\u0438\u0441\u043a\u043e\u0432\u043e\u0439 \u043f\u043e\u0434\u0441\u0438\u0441\u0442\u0435\u043c\u044b\u041f\u043e\u043d\u044f\u0442\u043d\u043e, \u0447\u0442\u043e \u0432 \u043f\u0435\u0440\u0432\u0443\u044e \u043e\u0447\u0435\u0440\u0435\u0434\u044c \u043d\u0443\u0436\u043d\u043e, \u043a\u0430\u043a \u043f\u0440\u0430\u0432\u0438\u043b\u043e: \u0423\u0432\u0435\u043b\u0438\u0447\u0438\u0442\u044c \u043e\u043f\u0435\u0440\u0430\u0442\u0438\u0432\u043d\u0443\u044e \u043f\u0430\u043c\u044f\u0442\u044c. \u042d\u0442\u043e \u043d\u0430\u0441\u0442\u043e\u043b\u044c\u043a\u043e \u043e\u0447\u0435\u0432\u0438\u0434\u043d\u044b\u0439 \u0445\u043e\u0434, \u0447\u0442\u043e \u044f \u0434\u0430\u0436\u0435 \u043d\u0435 \u0441\u0447\u0451\u043b \u043d\u0443\u0436\u043d\u044b\u043c \u043f\u0438\u0441\u0430\u0442\u044c \u043e\u0431 \u044d\u0442\u043e\u043c \u0432 \u043e\u0441\u043d\u043e\u0432\u043d\u043e\u0439 \u0441\u0442\u0430\u0442\u044c\u0435 \u041f\u043e\u0441\u0442\u0430\u0432\u0438\u0442\u044c \u0434\u043e\u043f\u043e\u043b\u043d\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0439 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440(\u044b) \u0438\u043b\u0438 \u0437\u0430\u043c\u0435\u043d\u0438\u0442\u044c \u043e\u0431\u0430 \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u0430 \u043d\u0430 \u043c\u0430\u043a\u0441\u0438\u043c\u0430\u043b\u044c\u043d\u043e \u043f\u0440\u043e\u0438\u0437\u0432\u043e\u0434\u0438\u0442\u0435\u043b\u044c\u043d\u044b\u0435 \u0432\u0435\u0440\u0441\u0438\u0438 \u043f\u043e\u0434\u0434\u0435\u0440\u0436\u0438\u0432\u0430\u0435\u043c\u044b\u0435 \u0441\u043e\u043a\u0435\u0442\u0430\u043c\u0438 \u0441\u0435\u0440\u0432\u0435\u0440\u0430. \u0414\u043b\u044f \u0441\u0442\u0430\u0440\u044b\u0445 \u0441\u0435\u0440\u0432\u0435\u0440\u043e\u0432, \u0447\u0442\u043e \u043f\u0430\u043c\u044f\u0442\u044c, \u043f\u0440\u043e\u0446\u0435\u0441\u0441\u043e\u0440\u044b, \u043a\u0430\u043a [&hellip;]<\/p>\n","protected":false,"gt_translate_keys":[{"key":"rendered","format":"html"}]},"author":1,"featured_media":26262,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"class_list":["post-34884","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-administrirovanie"],"aioseo_notices":[],"aioseo_head":"\n\t\t<!-- All in One SEO 4.9.10 - aioseo.com -->\n\t<meta name=\"description\" content=\"\u041f\u043e\u0447\u0435\u043c\u0443 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ritenuto necessario approfondirlo nell'articolo principale Installare processori aggiuntivi o sostituire entrambi i processori con versioni pi\u00f9 performanti supportate dagli socket del server. 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