Dell Y3F8W-CML Compellent 15.36TB TLC SAS 2.5" 12Gbps RI ISE SSD | WD WUSTVA1A1BSS200
Dell Y3F8W-CML is a 15.36TB SAS solid state drive for Dell Compellent storage arrays. Inside is the Western Digital Ultrastar DC SS540, model WUSTVA1A1BSS200. Western Digital describes the SS540 as its sixth-generation SAS SSD, built on 96-layer 3D TLC NAND behind a dual-port 12Gb/s SAS interface.
Endurance
The 15.36TB model is the 1 drive-write-per-day version, rated for up to 30,110 TB written. Western Digital bases that rating on an 8KiB random write workload over five years.
Performance at this capacity
Western Digital lists up to 2,130 MiB/s sequential read and 1,104 MiB/s sequential write for the 15.36TB model. Random 4KiB performance is up to 441,000 IOPS read and 110,000 IOPS write, with 188,906 IOPS on a 70/30 mixed workload. Average queue-depth-1 latency is 150 microseconds for reads and 300 for writes.
Power
The drive runs in 9W, 11W or 14W operating modes, with projected idle power of up to 4.7W for capacities above 15TB.
Data protection and security
The final 0 in the model number marks the Instant Secure Erase version, which supports crypto sanitize for quick redeployment. Power-loss data management and T10 end-to-end data protection are built in, and the unrecoverable bit error rate is 1 in 10^17.
Physical and reliability
It is a 2.5-inch, 15mm drive weighing up to 175g, rated for 0°C to 70°C internal operating temperature. Western Digital rates the SS540 at 2.5 million hours MTBF, a 0.35% annual failure rate.
