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SYS0021
 
Explanation
 
One of the following errors occurred:
 
    1. The drive is empty.
 
    2. The drive door is open.
 
    3. The drive is in use.
 
Action
 
Do one of the following:
 
1. Insert a diskette in the drive and retry the command.
2. Close the drive door and retry the command.
3. Wait until the drive is available and retry the command.