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Technical Details for Hitachi Endurastar J4K30 20 GB


Technical Details for Hitachi Endurastar J4K30 20 GB Hard Disk Drive
Hitachi Endurastar J4K30 20 GB 
Description: Model ID HEJ423020F9AT00 / Hitachi Endurastar J4K30 - Hard drive - 20 GB - internal - 2.5" - ATA-100 - 4200 rpm - buffer: 8 MB / Hitachi delivers a 50-percent storage capacity increase in its line of "extreme" hard disk drives. The Endurastar J4K30 is offered in capacities of 30GB, and ... more
Hitachi Endurastar J4K30 20 GB ... are designed specifically to perform in extreme temperature environments. With an operating temperature range as wide as -20°C to +85°C, the Endurastar models are built to perform in the harshest environments - from the desert heat to the Antarctic chill.

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.

Technical Details for Hitachi Endurastar J4K30 20 GB

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General
Device TypeHard drive - internal
Width7 cm
Depth10 cm
Height9.5 mm
Weight0.1 kg
Hard Drive
Form Factor2.5" x 1/8H
Capacity20 GB
Interface TypeATA-100
Buffer Size8 MB
FeaturesFluid Dynamic Bearing (FDB) motor, load/unload technology, glass disk, shock sensor
Performance
Drive Transfer Rate100 MBps (external) / 36.1 MBps (internal)
Seek Time13 ms (average) / 24 ms (max)
Average Latency7.19 ms
Spindle Speed4200 rpm
Reliability
Non-Recoverable Errors1 per 10^13
Start / Stop Cycles300,000
Expansion / Connectivity
Interfaces1 x ATA-100
Compatible Bays1 x internal - 2.5" x 1/8H
Environmental Parameters
Min Operating Temperature-20 °C
Max Operating Temperature85 °C
Humidity Range Operating5 - 90%
Shock Tolerance250 g @ 2ms half-sine pulse (operating) / 800 g @ 1ms half-sine pulse (non-operating)
Vibration Tolerance1 g @ 22-500 Hz (operating) / 5 g @ 22-500 Hz (non-operating)
 
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Hitachi Endurastar J4K30 20 GB