Subject: Re: Ensuring SAN LUN persistent names after reboot... 2007-11-01 - By Sandor W. Sklar
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On Nov 1, 2007, at 2:22 PM, Arpotu wrote:
> Hello,
>
> I have yet another SAN migration question. We're going to add many
> new
> SAN LUNs, which will end up being /dev/sdp-/dev/sdas. Once the new
> storage is built as md devices and added to LVM, we are going to
> release
> the old /dev/sdb-/dev/sdo devices.
>
> My concern is that after a reboot, the new devices will rename
> themselves
> to /dev/sdb-/dev/sdae and it will break the md device pairing (and
> LVM).
> Is there any way to ensure that LUN names are persistent after a
> reboot?
http://kbase.redhat.com/faq/FAQ_85_8082.shtm
... use UUIDs to refer to the disks, instead of the /dev/sdX devices.
(As an aside, maybe I'm stupid, but I find that SAN storage is so much
more complicated and fragile on Linux then on Solaris or AIX.)
-s-
--
Sandor W. Sklar, Unix Systems Administrator
Stanford University Libraries & Academic Information Resources (SULAIR)
http://library.stanford.edu
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