On Monday, July 28, 2014 05:55:40 PM you wrote: > > All tapes written with a blocksize smaller than 32K must be rewritten. > > They probably needs to be erased before relabeling with a different > > block size. > > ... phew. A bit of a task for a productive environment. > > How to erase? dd something? > Could you provide a howto (maybe later on the wiki) ? > > Thanks! > Stefan
I actually had to do this once, I used this script with an LTO-3 changer: #!/bin/sh # $1 = slot # $2 = tape name /usr/sbin/mtx -f /dev/sg3 load $1 /bin/mt -f /dev/st0l compression 0 /bin/mt -f /dev/st0l setblk 32768 /bin/mt -f /dev/nst0l compression 0 /bin/mt -f /dev/nst0l setblk 32768 /bin/dd if=/dev/zero bs=32768 count=200 of=/dev/st0l /bin/mt -f /dev/st0l compression 0 /bin/mt -f /dev/st0l setblk 32768 /bin/mt -f /dev/nst0l compression 0 /bin/mt -f /dev/nst0l setblk 32768 /usr/sbin/mtx -f /dev/sg3 unload $1 /usr/sbin/amlabel -f DailySet1 $2 slot $1 /bin/mt -f /dev/st0l compression 0 /bin/mt -f /dev/st0l setblk 32768 /bin/mt -f /dev/nst0l compression 0 /bin/mt -f /dev/nst0l setblk 32768 /usr/sbin/mtx -f /dev/sg3 unload $1 It worked ... and apparently I had some problems with the different tape device aliases along the way, although I don't remember the particulars. It probably does more things than are strictly necessary. I also seem to remember that one time a drive started dying, and one of the symptoms was block size errors ... if you continue to have problems, it may be a hardware issue.
