This is taken directly from a formerly confidential Seagate PowerPoint.
Attribute |
Desktop Barracuda |
Nearline Lite Constellation CS |
Nearline Constellation ES |
|
Capacity & Max Z-Height |
1TB: 20.2mm 2 & 3TB: 26.1mm |
1TB: 20.2mm 2 & 3TB: 26.1mm |
500GB, 1TB, 2TB, 3TB All 26.1mm max Z-Height | |
Firmware |
Desktop |
Nearline |
Typical Nearline | |
FW Download | Bench-top only; no rack | In-situ downloadable | In-situ downloadable | |
Security |
N/A |
Instant Secure Erase standard | Full SED available, FIPS available | |
RPM |
7,200 |
|||
Interface, Sector Size |
6Gbit/s SATA, 512 Emulated (4k on media / 512e at interface) |
6Gb/s SATA, 512 Native6 Gb/s SAS, 5xx Native | ||
Performance | Data Rate | OD Sustained: 150 – 180MB/s | OD: 150 MB/s & 155 MB/s | |
4k Random Write,
WCE |
Risk >50% performance loss if not aligned Aligned: 144 IOPS (Q1), 160 IOPS (Q16) Unaligned: 71 IOPS (Q1), 73 IOPS (Q16) | No potential alignment risk ES.1: 180 IOPS (Q1 & Q16) ES.2: 187 IOPS (Q1 & Q16) | ||
NL RV(at 20-1500Hz) |
~60% throughput at 12.5rad/sec2 |
>80% throughput at 12.5rad/sec2 |
>80% throughput at 12.5rad/sec2 | |
CommandCompletion Time | Will have issues in CCT- sensitive systems | Tuned for Nearline application | Tuned for Nearline application | |
Power, Idle & Read | 3.4 – 5.4 Watts Idle & 5.9 – 8.0 Watts Op Read | 4.6-7.7 W Idle & 7.4 – 10.7 W Rd | ||
Reliability Spec. | 750k Hr MTBF@ 2400 POH | 800k Hr MTBF @ 8760 POH | 1.2M hr MTBF @ 8760 POH | |
Warranty |
2 year |
3 year |
5 year |
|
Seagate Support | Desktop level available | Field Support Available | Field Support Available |
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