I needed to remove a redundant tapedrive from the tapelibrary used by my 
bacula system.
I did a 'bacula stop', did the work, then did a 'bacula start'.
I realised I'd forgotten to unmount the active tapedrive before stopping 
bacula, and thought the tape position may have been lost, so I then did 
an 'unmount' followed by a 'mount' of the appropriate slot.
Next time Bacula came to use this tape, I got:

04-Sep 12:00 ls3-dir JobId 42: Start Backup JobId 42, 
Job=Job1.2008-09-04_12.00.08
04-Sep 12:00 ls3-dir JobId 42: Using Device "LTO4-0"
04-Sep 12:00 ls3-sd JobId 42: Volume "B00012L4" previously written, 
moving to end of data.
04-Sep 12:04 ls3-sd JobId 42: Error: Unable to position to end of data 
on device "LTO4-0" (/dev/nst0): ERR=dev.c:895 ioctl MTEOM error on 
"LTO4-0" (/dev/nst0). ERR=Input/output error.

and bacula proceeded to use the next tape in the library.
Did I provoke the error?


Cheers,
Terry


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