Ensuring SAN LUN persistent names after reboot...

[Sandor W. Sklar]

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