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create test raidz1 array, nuke one drive, replace it with spare
[sysadmin-cookbook]
/
recepies
/
btrfs
/
mksnap
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#!/bin/sh -x
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mnt=$1
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rootfs=$mnt/rootfs
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snap=$mnt/.snap/
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date=`date +%Y-%m-%dT%H`
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btrfsctl=/usr/local/bin/btrfsctl
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test -d $rootfs || exit 1
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test -d $snap || mkdir $snap
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test -d $snap/$date && $btrfsctl -D $date $snap
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$btrfsctl -s $snap/$date $rootfs