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- Description
- Specifications
91K8T is the Dell part number for a 3TB 3.5 inch SAS hard drive with Seagate model number ST33000650SS, a Constellation ES.2 drive and a fifth-generation enterprise SAS design. The 6Gb/s interface (also 3.0 and 1.5 Gb/s) has dual ports, the spindle turns at 7,200 RPM and the multisegmented cache is 64 MB.
Sectors can be 512, 520 or 528 bytes and the drive carries protection information. Average seek time is 8.5 ms for reads and 9.5 ms for writes, average latency is 4.16 ms and the maximum sustained transfer rate is 155 MB/s. MTBF is 1.2 million hours, the annualized failure rate is 0.73 percent at 24x7 operation, and read errors are limited to one sector per 10E15 bits.
Idle power is 7.4 W and typical random-read power is 11.3 W from +12 V and +5 V. Operating temperature is 5 to 60 C, operating shock is 70 G on reads and 40 G on writes, and non-operating shock is 300 G. The case is 1.028 in (26.10 mm) high, 4.010 in (101.85 mm) wide and 5.787 in (147.00 mm) deep, and the drive weighs 700 g.
In the Dell range the 2TB drive with the same design is the 1D9NN and the 3TB self-encrypting FIPS 140-2 version is the 698PM.
| 91K8T Specs | |
| Part number | 91K8T |
| Capacity | 3TB |
| Interface | 6Gb/s SAS, dual port |
| Form factor | 3.5 inch, 26.1 mm |
| Spindle speed | 7,200 RPM |
| Cache | 64 MB |
| Sustained transfer | 155 MB/s |
| Seek time (read/write) | 8.5/9.5 ms |
| Average latency | 4.16 ms |
| MTBF | 1.2 million hours |
| Power (idle/random read) | 7.4/11.3 W |
| Weight | 700 g |