i've created an array,
mdadm --create /dev/md5 --level=1 --raid-devices=2 /dev/sda1 /dev/sdb1
checking,
cat /proc/mdstat
Personalities : [raid0] [raid1] [raid6] [raid5] [raid4] [linear]
md5 : active raid1 sda2[0] sdb2[1]
341991616 blocks [2/2] [UU]
bitmap: 0/164 pages [0KB], 1024KB chunk
i realized that it defaulted to metadata type = 0.90.
is it possible to _modify_ this array to use "super 1.x" metadata
type, rather than the default 0.90?
neither 'manage' or 'grow' modes seem to allow it,
mdadm --manage --metadata=1.2 /dev/md5
mdadm:option --metadata not valid in manage mode
mdadm --grow --metadata=1.2 /dev/md5
mdadm:option --metadata not valid in grow mode
thanks.
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