[CentOS] RAID1 migration - /dev/md1 is not there
Les Mikesell
lesmikesell at gmail.com
Tue Apr 1 03:49:47 UTC 2008
Sam Beam wrote:
> I am trying to convert an existing IDE one-disk system to RAID1 using the
> general strategy found here:
>
> http://lists.centos.org/pipermail/centos/2005-March/003813.html
>
> But I am stuck on one thing - when I went to create the second md device with
> mdadm,
>
> # mdadm --create /dev/md1 --level=1 --raid-devices=2 /dev/hdb2 missing
> mdadm: error opening /dev/md1: No such file or directory
>
> And indeed, ls /dev/md* shows only md0, which worked fine.
>
> I do have the 'raid1' kernel module loaded.
>
> What am I missing? Do I need to create the nodes manually now?
Add --auto=yes to the create command to add the device node. Udev based
systems don't have the nodes created ahead of time.
--
Les Mikesell
lesmikesell at gmail.com
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