Head Cleaning:
- Every 500 disks under normal conditions.
- Every 100 disks under humid conditions, or when using diskettes of poor quality.
Alignment:
- Check every 10,000 disks.
Normal drive life:
- About 100,000 disks, if cleaned regularly.
Normal reject rate for diskettes with DD with verify on:
About 1% with good quality diskettes, about 2% with bad quality diskettes.
Normal percentage of diskettes that go bad during shipping:
from 0.1 to 0.5%. This does not depend much on the quality of the diskettes.
