Tandon TM362 Manual page 16

TABLE 2-2
RELIABILITY SPECIFICATIONS
SOFT AND HARD READ ERROR RATES, EXCLUSIVE OF MEDIA DEFECTS
For data that has been verified previously as error free, and when used in conjunction with a data separator
and phase lock loop of good design, the recoverable (soft) read error rate for any subsequent read operation
shall not exceed one error in 1 x 10 10 bits transferred. A recoverable read error is an error that may be corrected
within five attempts to reread the data.
The nonrecoverable (hard) read error rates shall not exceed one error in 1 x 10
12
bits transferred. A nonrecoverable
read error is an error that may not be corrected within five attempts to reread data, providing that the writing
of the data previously has been verified as correct. The seek error rate is not to exceed one error in 1 x 10 6 seeks.
MEDIA DEFECTS
Any defects on the media surface will be identified on a defect map provided with each drive. This defect map
will indicate the head number, track number, and the number of bytes from index for each defect. Each defect
shall be no longer than 16 bits. Cylinders 000 and 001 are guaranteed error free.
The defect map is offered as a guide only. The number of defects and their locations can change due to customer
system variations, such as data separators.
Mean Time Between Failures
Mean Time To Repair
Component Design Life
Preventative Maintenance
NOTE
A parking track is located at cylinder 663,
to reduce the probability of damage to data
tracks during extreme shock conditions.
15,000 power on hours
30 minutes
5 years
Not Required
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CORPORATION, CHATSWORTH, CALIFORNIA 91311
2-6
179070-001
REVISION A