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WESTERN DIGITAL 80GB HARD DRIVE INTERNAL EIDE 8MB 3.5IN
Part No.: 298666
Manufacturer: Western Digital
Mfg. SKU: WD800AAJB
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List Price:
$85.39
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WESTERN DIGITAL 80GB EIDE ULTRA ATA-100 HD 8MB CACHE 7200 RPM SPECIAL EDITION
Features: - Rotational Speed: 7,200 RPM (nominal)
- Buffer Size: 8 MB
- Buffer To Disk: 602.0 Mbits/s (Max)
- Read Seek Time (Average): 8.9 ms
- Write Seek Time (Average): 10.9 ms (average)
- Track-To-Track Seek Time: 2.0 ms (average)
- Full Stroke Seek: 21.0 ms (average)
- Average Latency: 4.2 ms (nominal)
An important note about this hard drive:
Western Digital manufactures desktop edition hard drives and RAID Edition hard drives (this hard drive is a desktop edition hard drive). Each type of hard drive is designed to work specifically in either a desktop computer environment or on RAID controller.
If you install and use a desktop edition hard drive connected to a RAID controller, the drive may not work correctly. This is caused by the normal error recovery procedure that a desktop edition hard drive uses.
When an error is found on a desktop edition hard drive, the drive will enter into a deep recovery cycle to attempt to repair the error, recover the data from the problematic area, and then reallocate a dedicated area to replace the problematic area. This process can take up to 2 minutes depending on the severity of the issue. Most RAID controllers allow a very short amount of time for a hard drive to recover from an error. If a hard drive takes too long to complete this process, the drive will be dropped from the RAID array. Most RAID controllers allow from 7 to 15 seconds for error recovery before dropping a hard drive from an array. Western Digital does not recommend installing desktop edition hard drives in an enterprise environment (on a RAID controller).
Western Digital RAID edition hard drives have a feature called TLER (Time Limited Error Recovery) which stops the hard drive from entering into a deep recovery cycle. The hard drive will only spend 7 seconds to attempt to recover. This means that the hard drive will not be dropped from a RAID array.
If you install a RAID edition hard drive in a desktop computer, the computer system may report more errors than a normal desktop hard drive (due to the TLER feature). Western Digital does not recommend installing RAID edition hard drives into a desktop computer environment.
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