List, good afternoon,
I've recently needed to create a new raid1 array in an existing
(non-raid) Debian Wheezy system. The array has been created
read-only, and resync is PENDING; I didn't expect either of these
conditions.
Objective is to have an LVM built initially on mirrored unused 2TB
drives, with a view to growing the LVM with mirrored 3TB drives in the
future. The Logical volume will be exported over NFS, and will serve
as a repository for backups of other machines. The approach I am
following is, first, to create a raid1 array then, second, install an
LVM over that array, making sure that I create the LVM such that it
can be expanded.
(I think) I've created a raid1 on two empty and unpartitioned 2TB
drives, but am not seeing the results that the wiki
(https://raid.wiki.kernel.org/index.php/RAID_setup) seems to suggest.
# cat /proc/mdstat
reports
md0 : active (auto-read-only) raid1 sdc[1] sdb [0]'
1953383360 blocks super 1.2 [2/2] [UU]
resync=PENDING
This was the create command I used:
# mdadm --create /dev/md0 --level=1 --raid-devices=2 /dev/sdb /dev/sdc
I've read through man mdadm but had not expected 'auto-read-only', nor
'resync=PENDING'. Has something gone wrong, for some reason? Or do I
need, simply, to set the array to be read-write? I wondered whether
'create' does not 'start' the array, but it's reported as 'active', so
I think the array is started. I have not yet put a filesystem on the
array, because I am not sure the creation is ok.
Grateful for any comment, and apologies for what must seem a very
basic question,
regards, Ron
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