800GB Enterprise SSDs

Why an enterprise SSD reads 800GB

800GB sits on the higher-endurance capacity ladder: doubling it gives the 1.6TB, 3.2TB and 6.4TB sizes of KIOXIA's 3 DWPD 24G SAS line, while KIOXIA's 1 DWPD line comes in 1.92TB, 3.84TB and larger. Seagate explains the gap: over-provisioning sets aside part of an SSD's capacity where the user cannot reach it, which Seagate credits with longer endurance, and its own example turns a 128GB drive into a 100GB one. Look for the MU or WI label on each listing; our SSD endurance-class guide explains MU, WI and RI, and DWPD vs TBW explains drive-life ratings.

Bays differ by chassis, so check yours: Dell's PowerEdge R650, for example, takes SAS, SATA or NVMe drives in its 8- and 10-bay 2.5-inch layouts but SAS and SATA only in its 4 x 3.5-inch layout. Interface pages: NVMe SSDs, SAS SSDs, SATA SSDs. All capacities: enterprise SSDs.

Other capacities: 960GB, 1.92TB and 3.84TB enterprise SSDs; 2.5-inch NVMe drives are grouped under U.2 NVMe SSDs.

800GB endurance classes

An 800GB enterprise SSD is rated for either three or ten drive writes per day, and the class decides what it is for. KIOXIA builds 800GB in its three-per-day NVMe line, which it describes as suited to mixed read and write work, and Seagate builds it in a ten-per-day 12Gb/s SAS line it labels write intensive, with OLTP databases among the series' best-fit applications:

A drive rated for ten writes a day costs its endurance in capacity, which is why write-intensive lines stop at a few terabytes while one-write-per-day drives reach tens of terabytes. If the daily write volume is low, a 960GB drive of the one-per-day class gives more space in the same bay.