At Wed, 16 Feb 2011 13:43:16 -0500 (EST) CentOS mailing list <centos@xxxxxxxxxx> wrote:
>
> > On 2/16/2011 12:09 PM, compdoc wrote:
> >>> The problem is, the kernel seemingly randomly switches between
> >>> /dev/sdb and /dev/sdc for these devices.
> >>
> >> I use the UUID in fstab rather than '/dev/sda', etc
> >
> > In this case it would be something you give to mdadm to add a device
> > back to a set. And you'd have to know which one in a rotation was
> > coming back to which machine, something you wouldn't otherwise have to
> > track since it is going to overwrite everything with the re-sync anyway.
>
> We do track (and physically label) that, because there are drives of
> different size/manufacturer/geometry on different servers, so that would
> be ok.
Thought question: is there any *pattern* to the seemingly randomness of
the /dev/sdb vs. /dev/sdc business? Do disks of certain
sizes/manufacturer/geometry do the switch more or less often?
>
> However, we're not set up for UUIDs, the fstab just shows /dev/md0, etc.
> Perhaps this is the answer for us, but I'll have to look into how tricky
> it would be to migrate roughly 50 production servers.
>
> Thanks again!
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>
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