2 | U10 Family Product Manual, Rev. A |
Specification summary table
The specifications listed in this table are for quick reference. For details on specification measurement or definition, see the appropriate section of this manual.
Drive Specification | ST320423A |
| ST315323A |
| ST310212A |
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Guaranteed Mbytes (×106 bytes) | 20,485 |
| 15,364 |
| 10,242 |
Guaranteed sectors | 40,011,300 |
| 30,008,475 |
| 20,005,650 |
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Bytes per sector |
| 512 |
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Default sectors per track |
| 63 |
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Default read/write heads | 16 |
| 16 |
| 16 |
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Default cylinders | 16,383 |
| 16,383 |
| 16,383 |
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Physical read/write heads | 4 |
| 3 |
| 2 |
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Discs | 2 |
| 2 |
| 1 |
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Recording density |
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BPI (bits/inch max) |
| 396,067 |
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Track density |
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TPI (tracks/inch) |
| 20,107 |
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Areal density |
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(Mbits/inch2 max) |
| 7,964 |
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Spindle speed (RPM) |
| 5,400 |
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Internal |
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sec max) |
| 308 |
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I/O |
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sec max) |
| 66.6 |
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ATA |
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| PIO modes |
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supported | Multiword DMA modes | ||||
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| Ultra DMA modes |
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Cache buffer (Kbytes) |
| 512 |
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Height (mm max) |
| 26.1 |
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Width (mm max) |
| 101.85 |
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Length (mm max) |
| 147.0 |
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Weight (typical) |
| 544 grams (1.2 lb) |
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(msec typical) |
| 1.5 (read) 2.1 (write) |
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Average seek time (msec typical) |
| 8.9 |
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