Mass storage | The hard disk drive can be removed by the user for easy upgrades. The hard drive | |||||
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| is located on the bottom case and with the removal of one screw the hard drive can | ||||
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| be replaced. |
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| Hard drive manufacturer: IBM® and Toshiba (subject to change without notice). | ||||
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| 2.5" Hard Drive | 540MB | 810 MB | 810 MB | 1,215MB | |
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| AT Interface RLL | ATA2 Interface | ATA2 Interface | ATA2 Interface |
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| HDD (Toshiba) | HDD (Toshiba) | HDD (IBM) | HDD (IBM) | |
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| Note: VL models |
| Note: Current plan | Note: Currently |
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| shipping 11/95 |
| is to dual source | the 1.2GB drive is |
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| will have the |
| the 810MB hard | sole sourced from |
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| 540MB option |
| drive, currently the | IBM. |
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| Toshiba 810 is the |
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| major supplier |
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| Average seek | 12 ms | 12 ms | 12 ms | 12 ms | |
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| Track to track seek | 3 ms | 3 ms | 4 ms | 4 ms | |
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| Full Track | NA | 25 ms | 23 ms | 23 ms | |
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| Average latency | 7.5 ms | 7.1 ms | 6.1 ms | 6.1 ms | |
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| Rotational speed | 4000 rev/m | 4200 rev/m | 4900 rev/m | 4900 rev/m | |
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| Data transfer rate: |
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| Media Transfer | 43.75 Mbits/sec | 36.3 (inner), 57.0 | 36.3 (inner), 57.0 | ||
| rate | Mbits/sec | (max.) | (Outer) Mbits/sec | (Outer) Mbits/sec |
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| Buffer to host | 6 Mbytes/sec | 11.1Mbytes/sec | 11.1Mbytes/sec | 11.1Mbytes/sec | |
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| Buffer size | 128 Kbytes static | 128Kbytes static | 64KB (read and | 64KB (read and | |
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| RAM | RAM | write segmented | write segmented |
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| buffer) | buffer) |
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| Spindle start time | 5 sec (typical) | 5 sec (typical) | NA | NA | |
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| Reliability: |
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| MTBF: | 300,000 hours | 300,000 hours | 300,000 hours | 300,000 hours | |
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| Unrecoverable | 1 in 1013 (bits) | 1 in 1013 (bits) | 1/1.0E 13 bits | 1/1.0E 13 bits | |
| errors |
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| transfer | transfer |
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| Configuration: |
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| 2.5" Hard Drive | 540MB | 810 MB | 810 MB | 1,215MB | |
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