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# create a small raid6 array, make it larger. Then make it smaller
mdadm -CR $md0 -e 0.90 --level raid6 --chunk=64 --raid-disks 4 --size $[size/2] $dev1 $dev2 $dev3 $dev4
check wait
check state UUUU
testdev $md0 2 $[size/2] 32
mdadm --grow $md0 --size max
check resync
check wait
testdev $md0 2 $mdsize0 32
mdadm --grow $md0 --size $[size/2]
check nosync
testdev $md0 2 $[size/2] 32
mdadm -S $md0
# same again with version 1.1 superblock
mdadm -CR $md0 --level raid6 --metadata=1.1 --chunk=128 --raid-disks 4 --size $[size/2] $dev1 $dev2 $dev3 $dev4
check wait
check state UUUU
testdev $md0 2 $[size/2] 128
mdadm --grow $md0 --size max
check resync
check wait
testdev $md0 2 $[mdsize1_l] 128
mdadm --grow $md0 --size $[size/2]
check nosync
testdev $md0 2 $[size/2] 128
mdadm -S $md0
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