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Backup scripts access tape device using special hook functions. These functions take a single argument — the name of the tape device. Their names are kept in the following variables:
The name of begin function. This function is called before accessing the drive. By default it retensions the tape:
MT_BEGIN=mt_begin mt_begin() { mt -f "$1" retension }
The name of rewind function. The default definition is as follows:
MT_REWIND=mt_rewind mt_rewind() { mt -f "$1" rewind }
The name of the function switching the tape off line. By default it is defined as follows:
MT_OFFLINE=mt_offline mt_offline() { mt -f "$1" offl }
The name of the function used to obtain the status of the archive device, including error count. Default definition:
MT_STATUS=mt_status mt_status() { mt -f "$1" status }