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Hitachi Endurastar J4K30 20 GB
Endurastar hard drives are the preferred solution for automotive applications or other environments which require high robustness and wider operating temperatures than standard hard drive applications. In fact, the Endurastar J4K30 is already being used in car entertainment and navigation applications - and 30GBs of storage means users can store more than 5,000 audio files, four hours of MPEG2 video and enough navigation data to cover the entire planet! The Endurastar models feature glass media and load/unload technology in addition to shock sensor technology which cushions the drive in less than ideal shock or vibration conditions. Endurastar drives incorporate fluid dynamic bearings (FDB) in the spindle motor, allowing the same quiet operations and improved shock characteristics as with PC models, but offers even higher reliability for automotive environments. These features enable the Endurastar drives to employ a non-operating shock tolerance of 800G/1ms and an operating shock tolerance of 250G/2ms. |
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Technical Details for Hitachi Endurastar J4K30 20 GB
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| General | |
| Device Type | Hard drive - internal |
| Width | 7 cm |
| Depth | 10 cm |
| Height | 9.5 mm |
| Weight | 0.1 kg |
| Hard Drive | |
| Form Factor | 2.5" x 1/8H |
| Capacity | 20 GB |
| Interface Type | ATA-100 |
| Buffer Size | 8 MB |
| Features | Fluid Dynamic Bearing (FDB) motor, load/unload technology, glass disk, shock sensor |
| Performance | |
| Drive Transfer Rate | 100 MBps (external) / 36.1 MBps (internal) |
| Seek Time | 13 ms (average) / 24 ms (max) |
| Average Latency | 7.19 ms |
| Spindle Speed | 4200 rpm |
| Reliability | |
| Non-Recoverable Errors | 1 per 10^13 |
| Start / Stop Cycles | 300,000 |
| Expansion / Connectivity | |
| Interfaces | 1 x ATA-100 |
| Compatible Bays | 1 x internal - 2.5" x 1/8H |
| Environmental Parameters | |
| Min Operating Temperature | -20 °C |
| Max Operating Temperature | 85 °C |
| Humidity Range Operating | 5 - 90% |
| Shock Tolerance | 250 g @ 2ms half-sine pulse (operating) / 800 g @ 1ms half-sine pulse (non-operating) |
| Vibration Tolerance | 1 g @ 22-500 Hz (operating) / 5 g @ 22-500 Hz (non-operating) |

