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Automating executing commands on multiple tapes and changing (loading) them

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Old 11-05-2009
Automating executing commands on multiple tapes and changing (loading) them
The thing that we need to be able to do is:

- Scanning tapes from failed backup jobs with bscan (a bacula command)
- loading the next tape with the mtx command

Bscan does unload tapes but does not load them.

Bscan comes with this message when it's done with a tape:

Mount Volume "XO7563L3" on device "Tape1" (/dev/nst0) and press return when ready:

The script doesn't have to be fancy like determine in what slot the volume is. It would be enough just loading the tapes from let's say slot 10 to 24 and we need to make sure they are loaded in the right order into the tape library.

The thing that we ran into is that when the above message appears it normally should input the answer but in this case it should run another command first and then input the answer.

Is Expect the program for the job and how to do it?

Thanks...
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LEARN ABOUT PLAN9

bscan

BSCAN(8)					     Network backup, recovery and verification						  BSCAN(8)

NAME

	bscan - Bacula's 'Scan tape'

SYNOPSIS

       bscan [options] bacula-archive

DESCRIPTION

       The  purpose  of  bscan is to read (scan) a Bacula Volume and to recreate or update the database contents with the information found on the
       Volume.	This is done in a non-destructive way. This permits restoring database entries that have been lost by pruning, purging,  deleting,
       or a database corruption problem.

       Normally, it should not be necessary to run the bscan command because the database is self maintaining, and most corrupted databases can be
       repaired by the tools provided by the database vendors.	In addition, if you have maintained bootstrap files during backups, you should	be
       able to recover all your data from the bootstrap file without needed an up to date catalog.

       bscan command.

OPTIONS

       A summary of options is included below.

       -?     Show version and usage of program.

       -b bootstrap
	      Specify a bootstrap file.

       -c config
	      Specify configuration file.

       -d nn  Set debug level to nn.

       -dt    Print timestamp in debug output.

       -m     Update media info in database.

       -D     Specify the driver database name (default: NULL)

       -n name
	      Specify the database name (default: bacula)

       -u username
	      Specify database username (default: bacula)

       -P password
	      Specify database password (default: none)

       -h host
	      Specify database host (default: NULL)

       -t port
	      Specify database port (default: 0)

       -p     Proceed inspite of I/O errors.

       -r     List records.

       -s     Synchronize or store in Database.

       -S     Show scan progress periodically.

       -v     Verbose output mode.

       -V volume
	      Specify volume names (separated by '|')

       -w dir Specify working directory (default from conf file)

SEE ALSO

       bls(8), bextract(8).

AUTHOR

       This manual page was written by Jose Luis Tallon <jltallon@adv-solutions.net>, for the Debian GNU/Linux system (but may be used by others).

Kern Sibbald							 26 November 2009							  BSCAN(8)