3.0Drive specifications
Unless otherwise noted, all specifications are measured under ambient conditions, at 25°C, and nominal power.
3.1Specification 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 | ST750LX003 | ST500LX003 | |
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Formatted GB (512 bytes/sector)* | 750 | 500 | |
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Guaranteed sectors | 1,465,149,168 | 976,773,168 | |
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Bytes per sector | 4K emulation @ 512 |
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Physical read/write heads | 4 |
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Discs |
| 2 |
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Cache (MB) |
| 32 |
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Recording density in BPI (bits/in max) | 1778k |
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Track density TPI (tracks/in max) | 317k |
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Areal density (Gb/in2 max) | 563.6 |
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Spindle speed (RPM) | 7200 |
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Average latency (ms) | 4.20 |
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Internal transfer rate (Gb/s max) | 1.23 |
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I/O data transfer rate (Gb/s max) | 6.0 |
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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 ± .008 in) |
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Width (max) |
| 69.85 ± 0.25 mm (2.750 ± 0.010 in) |
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Length (max) |
| 100.30 ± 0.25 mm (3.949 ± 0.010 in) |
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Weight (max) |
| 115 g (0.253 lb) |
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5.0 |
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Standby to ready (sec typical) | 3.5 |
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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) | 1.2 |
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Read power (watts typical) | 3.3 |
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4 | Momentus XT Product Manual, Rev. D |
