Commodore PC - Appendix D Disk and Device Errors; Type Messages; Bad call format error; Bad command error

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Appendix D
~ Disk and Device Errors
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This appendix describes ms-dos disk and device error messages.
(~*) Refer to Appendix E, "ms-dos Message Directory," for other ms-dos
messages.
If a disk or device error occurs at any time during a command or
f*} program, ms-dos displays an error message in the following format:
type action device
fs. Ab ort, Retry, Ignore :_
This appendix lists the type, action, and device messages in
^. separate sections.
Type Messages
C*\ The type message is one of the following:
oa=o=
Bad call format error B
y"-v ■ The length of the request header passed to the device header
was incorrect.
Bad command error
C*\ ■ A device driver issued an incorrect command to the device
specified in the error message.
/—^ Bad unit error
' ( ■ Invalid subunit numbers were passed to the device driver.
GSB3S
Data error P
[\ ■ ms-dos could not read the data from the disk properly. This is
often due to a defective disk.
Try choosing R (for Retry) several times, or choose A (for
f~*} Abort) to end the program. (It's a good idea to make a new
copy of the disk, because if it's defective, you may lose
information.)
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