Apple Workgroup Server 8150/110 - Manual (Page 70)

To minimize the chance of condensation, adhere to the environmental require-
ments described in the Technical Information booklet and follow these general
cassette guidelines:
m Use tape cassettes at temperatures between 5˚ C (40˚ F) and 40˚ C (104˚ F).
m If you expose the tape cassettes to temperatures outside the operating limits,
you can stabilize them by leaving them in the proper operating temperature
for a minimum of two hours.
Follow these guidelines to avoid temperature problems:
m Avoid exposing cassettes to severe temperature conditions. For example,
don’t store a cassette in a car in bright sunlight.
m Avoid transferring data to or from a tape cassette when the temperature is
changing by more than 10˚ F per hour (roughly 5˚ C per hour).
Cleaning the tape-drive heads
The most common reason for the display of a caution signal on the front panel
is that the tape-drive heads are dirty. Although your tape drive has a built-in
roller for cleaning the heads during normal operation, you still need to perform
a separate cleaning step as part of preventive maintenance.
Your system comes with a cleaning cassette that you should use to clean the
tape-drive heads after every 25 hours of running time.
Use only a DDS cleaning cassette. When you insert the cleaning cassette into
the drive, the drive automatically loads it and cleans the heads. When the cleaning
process is completed, the drive automatically ejects the cassette. Keep a record
of how many times you use the cleaning cassette. After 25 uses, replace it.
The interval at which you clean the tape drive depends on how often you use
it. In general, if you back up daily, you should clean the drive weekly. If you
back up weekly, you should clean the tape drive once a month.
For more information about using the cleaning cassette, refer to the
instructions that came with it. For additional cleaning cassettes, see your
Apple-authorized service provider.
54 Chapter 5 / Using a DAT Drive and Tape Cassettes