I am setting up a new SLES10SP2/OES2SP1 2 node cluster using iSCSI shared storage
and NCS.

My SBD LUN on the iSCSI SAN showed up as /dev/sda and my other iSCSI LUN is
/dev/sdb on both boxes. I applied some updates on the servers, rebooted and now I see the SBD LUN on 1 server is /dev/sdb and on the other server it is /dev/sda, I
reboot first server and the SBD LUN is back on /dev/sda

I have never seen this happen with any of my other iSCSI LUNs but it has me
thinking if it will happen again and what kind of havoc will it wreak on my
cluster. So my question, is there a way to "pin" a device name (/dev/sda,
/dev/sdb, etc.) to a certain LUN and/or is there a way to use /dev/by-id
for iSCSI?

I have done some searches ban found some info on using udev to accomplish
this but I am not sure if that is the way to go?