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267
Appendix D
~
Disk and Device Errors
n
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.)
n
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