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Create an RAID1 array degraded

mdadm --create --level 1 -n 2 /dev/md0 /dev/sda1 missing

don't mix up –create and –build, as the latter will not write meta date to the partion.

Resize RAID1 after underlying partitions are resized

mdadm --grow /dev/md0 --bitmap none
mdadm --grow /dev/md0 --z max
( mdadm -W /dev/md0 && mdadm --grow /dev/md0 --bitmap internal ) &
watch 'cat /proc/mdstat ; mdadm --detail /dev/md0 | fgrep -i bitmap'

Increase resync speed

Increase values in


or in



docs/tips_n_tricks/softraid.html.txt · Last modified: 22.09.2019 17:29 CEST by peter

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