Table 2: | Drive specifications for 250 and 160 GB models |
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| ST9250315AS | ST9160314AS |
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Drive specification | ST9250315ASG | ST9160314ASG | ST9160301AS | |
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Formatted Gbytes (512 bytes/sector)* | 250 | 160 |
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Guaranteed sectors | 488,397,168 | 312,581,808 |
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Bytes per sector | 512 |
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Physical read/write heads | 2 |
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Discs |
| 1 |
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Cache (Mbytes) | 8 |
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Recording density in BPI (bits/inch avg) | 1,490k |
| 1,238k | |
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Track density TPI (tracks/inch avg) | 265k |
| 210k | |
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Areal density (Gbits/inch2 avg) | 394 |
| 269 | |
Spindle speed (RPM) | 5,400 |
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Average latency (msec) | 5.6 |
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Internal transfer rate (Mbits/sec max) | 1,175 |
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I/O data transfer rate | 300 |
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(Mbytes/sec max) |
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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 (0.374 |
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Width (max) |
| 69.85 mm +/- 0.25 mm (2.75 +/- 0.0098 inches) |
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Length (max) |
| 100.35 + 0.20 / - 0.25 mm (3.957 + 0.0079 / - 0.0098 inches) |
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Weight (max) |
| 93.5 grams (0.206 lb) |
| 105 grams (0.23 lb) |
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3.6 |
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3.8 |
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Standby to ready (sec typical) | 1.8 |
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Standby to ready (sec max) | 2 |
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1 |
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Average seek, read (msec typical) | 14 |
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30 |
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Startup current, +5V (max) | 1 amp |
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Seek power (typical) | 1.54 watts |
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Read/write power (typical) | Read: 1.40 watts; Write: 1.78 watts |
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Idle mode, low power (typical) | 0.67 watts |
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Standby mode |
| 0.20 watts (typical)*** |
| 0.22 watts (typical)*** |
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Sleep mode |
| 0.20 watts (typical)*** |
| 0.22 watts (typical)*** |
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Voltage tolerance (including noise) | +5V ± 5% |
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Ambient temperature | 0° to 60°C (operating), |
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Temperature gradient | 20°C (operating) |
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(°C per hour max) | 35°C (nonoperating) |
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Relative humidity | 5% to 95% (operating) |
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| 5% to 95% (nonoperating) |
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Relative humidity gradient | 30% per hour max |
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Wet bulb temperature | 37.7 (operating) |
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(°C max) |
| 40 (nonoperating) |
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Altitude, operating |
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Momentus 5400.6 SATA Product Manual, Rev. E |
| 5 | ||