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Toshiba Corporation Digital Media Network Company
Page 27 of 157
© 2005, Copyright TOSHIBA Corporation All Rights Reserved
9. RELIABILITY
A failure is defined as an inability of the drive to perform its specified function described in the requirements
of this document when being operated under the normal conditions or conditions specified in this document.
However , damages caused by operation mistake, mishandling, accidents, system errors and other
damages that can be induced by the customers are not defined as failure.
.
9.1 Error Rate
9.1.1 Non- Recoverable Error Rate
1 error per 10
13
bits read
The defective sectors allocated to the spare locations in the factory are not counted in the error rate.
9.1.2 Seek Error Rate
1 error per 10
6
seeks
A seek error is a positioning error recoverable by a retry including recalibration.
9.2 Product Life
Approximately 5 years or 20,000 power on hours whichever comes earlier under the following conditions.
- Power on hours (note1) : Less than 333 hours/month
- Operating (note2) : Less than 20% of power on hour
- Number of seek : 1.30 x 10
6
seeks / month
- Enviroment : Normal ( 25
o
C, 101.3 kPa ( 1,013 mb ) )
- Do not apply electrical static discharge, vibration and shock to the drive.
- Do not press top cover and bottom PCBA surface of the drive.
- All others condition should be within specification shown in section 6/7/8/9.
(note1) Power on hour includes sleep and standby mode.
(note2) Operating : seeking, writing and reading.
Applicable warranty and warranty period should be covered by the purchase agreement.
9.3 Repair
A defective drive should be replaced. Parts and subassemblies should not be repaired individually .
9.4 Preventive Maintenance (PM)
No preventive maintenance is required.