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docs:tips_n_tricks:softraid.html

SoftRAID

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'

Increas resync speed

Increase values in

/proc/sys/dev/raid/speed_limit_min
/proc/sys/dev/raid/speed_limit_max

or in

/sys/block/md*/md/sync_speed_min
/sys/block/md*/md/sync_speed_max

respectively

docs/tips_n_tricks/softraid.html.txt · Last modified: 19.11.2016 14:34 UTC by peter