sudo mdadm --grow /dev/md1 --chunk=128 --backup-file=/mnt/tmp/backup
locks up the computer and forces a resync.
mdadm 3.1.1 kernel 2.6.32.10
/dev/md1 is a 3 disk raid5 64k chunk size. /mnt/tmp is a spare hard drive.
sudo mdadm --grow /dev/md1 --chunk=128 --backup-file=/mnt/tmp/backup
locks up the computer and forces a resync.
mdadm 3.1.1 kernel 2.6.32.10
/dev/md1 is a 3 disk raid5 64k chunk size. /mnt/tmp is a spare hard drive.