Digital Equipment RW504-ZA, Руководство по обслуживанию

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• Contamination of the drive objective lens
On an otherwise working drive, check to see that the most current firmware code
level is being used and/or that all applicable service notes have been done. If so,
contamination could be a cause and cleaning may be necessary.
In the case of a read failure, cleaning might be the only way to get the customer’s
data back. In the case of performance loss, a few minutes spent cleaning may
prevent unnecessary replacement of service parts and present an opportunity to
‘‘fix the site’’ and help the customer prevent contamination in the future.
The following are recommendations for preventing contamination of disks and the
disk drive:
• Place the library away from high traffic areas.
• Do not leave a disk in the drive for extended periods of time if possible.
• Do not use the library in ‘‘dirty’’ environments such as coal mines, railroad
maintenance yards, etc.
4.3.1 Cleaning Tools Available
Disks may be cleaned with the Optical Disk Cleaning Kit (see Appendix B for
ordering information). This kit contains swabs and alcohol, cleaning instructions,
and a special cartridge holder that keeps the sliding sleeve open.
Note
If the problem appeared as loss of performance and cleaning a disk solved
the problem, another couple of steps must be done to regain performance
using that disk.
As performance was declining because of read/write problems, the disk
was probably becoming fragmented through excessive ‘‘sparing.’’ To regain
performance, the data on each side of the disk should be stored, each side
of the disk reformatted, and the data restored back on the disk.
CAUTION
Do not attempt to clean the optical drive objective lens!
Although disk drive cleaning kits are available, they cannot be used with
RW504/RW524. Damage to the optical drive mechanism could result if
unapproved cleaning kits are used.
4–8 Troubleshooting and Diagnostics