2.0Drive specifications
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power.
2.1Specification summary table
The specifications listed in this table are for quick reference. For details on specification measurement or defi- nition, see the appropriate section of this manual.
Table 1: | Drive specifications |
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Drive specification | ST95005620AS | ST93205620AS |
| ST92505610AS | |
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Formatted GB (512 bytes/sector)* | 500 | 320 |
| 250 | |
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Guaranteed sectors | 976,773,168 | 625,142,448 |
| 488,397,168 | |
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Bytes per sector | 512 |
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Physical read/write heads | 4 | 3 |
| 2 | |
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Discs |
| 2 |
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| 1 |
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Cache (MB) |
| 32 |
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Recording density in BPI (bits/in max) | 1,490k |
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Track density TPI (tracks/in max) | 265k |
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Areal density (Gb/in2 max) | 394 |
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Spindle speed (RPM) | 7200 |
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Average latency (ms) | 4.17 |
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Internal transfer rate (Gb/s max) | 1.23 |
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I/O data transfer rate (Gb/s max) | 3.0 |
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ATA | SATA 1.0, Serial ATA Revision 2.6 |
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| PIO modes |
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| Multiword DMA modes |
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| Ultra DMA modes |
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Height (max) |
| 9.5 +/- 0.2 mm (0.370 |
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Width (max) |
| 69.85 +/- 0.25 mm (2.750 +/- 0.010 in) |
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Length (max) |
| 100.35 +0.20 / | in) | ||
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Weight (max) |
| 110 g (0.238 lb) |
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| 105 g (0.227 lb) |
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4.5 |
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Standby to ready (sec typical) | 3.0 |
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1.5 |
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Average seek, read (ms typical) | 11.0 |
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Average seek, write (ms typical) | 13.0 |
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Startup current, +5V amps (max) | 1.0 |
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Seek power (watts typical) | 2.2 |
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Momentus XT Product Manual, Rev. B | 3 |
