Disk error messages
DOS ERROR MESSAGES
OK (00 00 00)
No errors encountered.
FILES SCRATCHED (00 £ Files 00)
Files scratched.
BLOCK HEADER NOT FOUND (20 T S)
Disk controller is unable to locate the header o-f
the requested data block. Caused by an illegal
sector number, or the header has been destroyed.
NO SYNC CHARACTER (21 T S)
Disk controller is unable to detect a sync mark on
the desired track. Caused by misalignment of the
read/write head or no diskette is present. Can
also indicate a hardware failure.
DATA BLOCK NOT PRESENT (22 T S)
Disk controller has been requested to read or
verify a data block which was not properly
written. This error message occurs in conjunction
with the BLOCK COMMANDS and indicates an illegal
track and/or sector request.
CHECKSUM ERROR IN DATA BLOCK (23 T S)
This error message indicates that there is an
error in one or more of the data bytes. The data
has been read into the DOS memory, but the
checksum over the data is in error. This message
may also indicate grounding problems.
BYTE DECODING ERROR (24 T S)
The data or header has been read into the DOS
memory, but a hardware error has been created due
to an invalid bit pattern in the data byte. This
message may also indicate grounding problems.
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