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How to tell if a tape is loaded
2005-11-29 10:01:55
I use a ctontab script to run my backups.
Right now the guts of the script are as follows:
/usr/local/bin/vxaTool /dev/st0 -C 1 //turns on compression
/usr/sbin/amdump SeinerHome
/usr/sbin/amverify SeinerHome
/usr/local/bin/vxaTool /dev/st0 -u //ejects tape
The problem is that if there is no tape in the drive, the dump fails,
but the verify hangs. The next time I insert a tape, the verify
completes and ejects the tape....
So, I'd like to add a line to test if the drive is loaded. If it is,
continue, if not, generate an error and terminate the script.
I am using a VXA-1 tape drive.
I've been testing
mt -f /dev/nst0 load
which appears to work, returning 0 if the tape is loaded and 2 if it is
not....
Is this the 'correct' way to test for a loaded tape? Is there a better
way? vxaTool (the VXA toolbox from Ecrix) doesn't have any options to
test for loaded tape.
TIA,
--Yan
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