Status - ZiLOG Z80-RIO Operating System User's Manual

5.40
STATUS
SYNTAX
STATUS [011 .•• 617]
DESCRIPTION
STATUS
Lists statistics on how much of the disk on the specified
drive has been used and how much of it remains available
for new files. The default lists statistics on all drives
which are ready.
Two error conditions are detected by the STATUS command.
As part of the disk allocation maps kept on the disk,
the number of free sectors and the number of allocated
sectors are maintained. In the event they do not sum up
to the number of sectors on the disk, the message
WARNING: DISK STATISTICS ARE INCONSISTENT
is printed. If the total number of sectors marked as
unallocated in the sector map do not equal the free
sector count, then the following message is printed:
WARNING: ALLOCATION IS INCONSISTENT
This is somewhat more serious than the previous error
condition and could mean that sectors which are logically
part of a file are marked unallocated in the allocation
map. These errors may result from memory failure, disk
write failure, deleting files with pointer errors, etc.,
and generally indicate reformatting of the diskette.
However, it may still be possible to read all files from
the disk and avoid loss of data.
I/O UNIT UTILIZATION
Unit 2: output listing
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