See our most frequently asked questions about Constellation internal hard drives.
Read MoreAmbient air temperatures of 95°F (35°C) or greater and poor ventilation from the smaller case designs of Shuttle boxes, LAN party boxes, racks, cabinets and drawers, can shorten the life of your hard disc.
Read MoreTroubleshooting and Configuration Tips for SCSI Time Outs
Read MoreBad sectors can often be corrected by using a spare sector built into the drive. However, any information written to a bad sector is usually lost.
Read MoreAll Seagate and Maxtor-brand hard drives can be fitted sideways or upside down. As long as they are not moved during use and receive sufficient cooling, it is irrelevant in which direction they are mounted.
Read MoreSeagate DiscWizard works with Maxtor and Seagate disc drives. The software lets you install your new disc drive quickly, with wizards that guide you through the processes of creating and formatting partitions on your disc drive, transferring and backing up your data. Learn more
MaxBlast works with Maxtor disc drives only. The software lets you install your new disc drive quickly, with wizards that guide you through the processes of creating and formatting partitions on your disc drive, transferring and backing up your data. Learn more
The quick diagnostic tool that checks the health of your drive. Learn more

| Generation | ES.3 | Constellation ES.2 | Constellation ES | ||||||
|---|---|---|---|---|---|---|---|---|---|
| Capacity | 4TB | 3TB | 2TB | 1TB | 3TB | 2TB | 2TB | 1TB | 500GB |
| Show me: | |||||||||
| Form Factor | 3.5" | 3.5" | 3.5" | 3.5" | 3.5" | 3.5" | 3.5" | 3.5" | 3.5" |
| Interface Options | SAS 6Gb/s, SATA 6Gb/s | SAS 6Gb/s, SATA 6Gb/s | SAS 6Gb/s, SATA 6Gb/s | SATA 6Gb/s, SAS 6Gb/s | SATA 6Gb/s, SAS 6Gb/s | SATA 6Gb/s, SAS 6Gb/s | SAS 6Gb/s, SATA 3Gb/s | SATA 6Gb/s, SAS 6Gb/s, SATA 3Gb/s | SAS 6Gb/s, SATA 3Gb/s |
| Performance | |||||||||
| Spindle Speed (RPM) | 7200 | 7200 | 7200 | 7200 | 7200 | 7200 | 7200 | 7200 | 7200 |
| Cache (MB) | 128 | 128 | 128 | 128 | 64 | 64 | 16, 64 | 64, 16, 32 | 16, 64, 32 |
| Transfer Rate, Max Ext (MB/s) | 600 | 600 | 600 | 600 | 600 | 600 | 600, 300 | 600, 300 | 600, 300 |
| Sustained Data Rate OD | 175MB/s | 175MB/s | 175MB/s | 175MB/s | 155MB/s | 155MB/s | 150MB/s, 147Mb/s, 140MB/s | 147Mb/s, 150MB/s, 140MB/s | 150MB/s, 147Mb/s, 140MB/s |
| Average Latency (ms) | 4.16 | 4.16 | 4.16 | 4.16 | 4.16 | 4.16 | 4.16 | 4.16 | 4.16 |
| Reliability/Data Integrity | |||||||||
| Non-recoverable Read Errors per Bits Read | 1 in 1015 | 1 in 1015 | 1 in 1015 | 1 in 1015 | 1 in 1015 | 1 in 1015 | 1 in 1015 | 1 in 1015 | 1 in 1015 |
| Annualised Failure Rate (AFR) | 0.63% | 0.63% | 0.63% | 0.63% | 0.73% | 0.73% | 0.73% | 0.73% | 0.73% |
| Power Management | |||||||||
| Seek, Typical Operating (W) | 6.76 | ||||||||
| Idling, Typical Operating (W) | 7.80, 6.73 | 6.74, 6.73 | 5.78, 5.17 | 4.45, 4.84 | 7.71, 7.40 | 7.71, 7.40 | 7.26, 5.69, 6.39 | 4.42, 5.41, 5.16, 4.61 | 4.67, 4.32, 3.74 |
| Environmental | |||||||||
| Temperature | |||||||||
| Operating | 5° to 60°C | 5° to 60°C | 5° to 60°C | 5° to 60°C | 5° to 60°C | 5° to 60°C | 5° to 60°C | 5° to 60°C | 5° to 60°C |
| Non-operating | -40° to 70°C | -40° to 70°C | -40° to 70°C | -40° to 70°C | -40° to 70°C | -40° to 70°C | -40° to 70°C | -40° to 70°C | -40° to 70°C |
| Shock | |||||||||
| Operating: Gs (ms) | 70/40 (2ms) | 70/40 (2ms) | 70/40 (2ms) | ||||||