Mitsubishi Electric MELDAS 600M Series Instruction Manual page 432

(3) Other precautions for use
(a) Life of the floppy disk unit
(b) Backup recommendation
(c) Observance of working conditions
(d) Writing to floppy disks
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The durability of the floppy disk unit is guaranteed for five years of FDD motor operation or
12,000 hours of accessing, whichever comes first. However, correct reading/writing may
become impossible sooner if dust and foreign matter adhere to the drive under a dusty, dirty,
etc., working environment.
Periodically clean the floppy disk unit head (refer to section (1)) to avoid trouble such as this.
Floppy disks should be copied when suitable, as a precaution against floppy disk damage,
data damage, etc., as well as for storing important data.
Floppy disk units and floppy disks are sensitive to temperature and humidity changes, dust
and dirt. Therefore, floppy disk units and floppy disks should be used observing the
precautions mentioned above.
If the working conditions are not satisfied, especially with regard to temperature, (for example,
when starting at temperatures below freezing) the data track and head position may deviate,
making correct reading impossible.
In this case wait for the inside temperature to rise before starting.
The correct temperature range for writing to floppy disks is between 10°C to 40°C.
Observe the temperature conditions when writing to floppy disks.
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CHAPTER 3 MAINTENANCE
7. Daily Maintenance
III – 46