tar: Magnetic Tape Control
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1 5.4.2 Magnetic Tape Control
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1 Backup scripts access tape device using special "hook functions". These
1 functions take a single argument -- the name of the tape device. Their
1 names are kept in the following variables:
1
1 -- Backup variable: MT_BEGIN
1 The name of "begin" function. This function is called before
1 accessing the drive. By default it retensions the tape:
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1 MT_BEGIN=mt_begin
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1 mt_begin() {
1 mt -f "$1" retension
1 }
1
1 -- Backup variable: MT_REWIND
1 The name of "rewind" function. The default definition is as
1 follows:
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1 MT_REWIND=mt_rewind
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1 mt_rewind() {
1 mt -f "$1" rewind
1 }
1
1 -- Backup variable: MT_OFFLINE
1 The name of the function switching the tape off line. By default
1 it is defined as follows:
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1 MT_OFFLINE=mt_offline
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1 mt_offline() {
1 mt -f "$1" offl
1 }
1
1 -- Backup variable: MT_STATUS
1 The name of the function used to obtain the status of the archive
1 device, including error count. Default definition:
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1 MT_STATUS=mt_status
1
1 mt_status() {
1 mt -f "$1" status
1 }
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