topic Re: Boot from SAN question in Operating System - HP-UX

Boot from SAN question

Francis Flan — Thu, 29 Nov 2007 18:13:55 GMT

If i had a HPUX v3 server which boots from SAN
and i had HPUX v2 on another server, also from SAN: is it possible to shutdown the servers and swap the LUNs, presenting each LUN to the other server?
Would this work?

Re: Boot from SAN question

Bill Hassell — Thu, 29 Nov 2007 21:39:48 GMT

There are a lot of questions to answer, most will make the task very difficult. The most important is: are the servers IDENTICAL? I don't mean that they are both PA-RISC or that they are in the same family such as an rp8400 and an rp8420. I mean that except for RAM and CPU count, the machines have the exact same I/O cards and are connected to the same subnet. There is a lot of hardware-specific information stored on disk and would cause problems booting on a different box.

Re: Boot from SAN question

Francis Flan — Fri, 30 Nov 2007 03:25:23 GMT

The servers are identical integrity servers.

Re: Boot from SAN question

Torsten. — Fri, 30 Nov 2007 03:40:09 GMT

Not sure if this works on the fly without doing some modifications.

11.23 is based on the LUN number, if you don't change the LUN number to the original value the system will not find the LUN to boot from.

11.31 is based on WWID, so this is changing and the system will not find the disk too.