HP-UX with EVA8k storage

[Philip Leenman]

Hi, I need to move my HP-UX cluster (RX4640 Itanium) with SAN storage and boot from SAN storage on existing switches to a newer set. HP-UX is also configured with VXVM. The newer FC switches have different domain IDs and different port addresses, so the FC addresses will be different. WWIDs stay the same for both HBAs and EVA ports.
Questions: How is HP-UX handling this change?
Changing the boot paths in the EFI shell is not the only issue I expect?
Who has suggestions?

Thanks.

[Steven E. Protter]

Shalom,

HP-UX will handle the change very well.

EFI shell, few other things need to be done to make a new boot disk.

This document is a partial answer

http://www.hpux.ws/?p=21

Booting from the SAN is a mistake. Putting the cluster data there is a good idea. Booting from the SAN gives you an instant stop when a cable is pulled or the SAN has a short term problem.

Booting from local disk and connecting to the SAN gives you diagnostics with which to detect SAN problems.

SEP

[sujit kumar singh]

hi

Assign the LUNS from the NEW storage to the server. Try doing an ioscan on the SAN disks and note the hardware paths. boot in EFI the server,do map and reconnect -r so as to see and discover the new LUNS, try identifying the new SAN luns properly, once identified, boot the server using old disks, do lvextend mirroring,

once the mirroring of boot disks is over, do a setboot to create the alt boot paths.

make using setboot autoboot and autosearch as ON.

do an ioscan -e as in 11iv3 this shall show the disks in the EFI Format, compare and note the paths.

reboot and go in EFI, check and compare the new paths added as noted in the step of ioscan -f O/P.
let the system boot in alternate path to check.

If all is fine, then remove the MIrros of the root LV using lvreduce.

update lvlnboot -v and lvlnboot -R and /stand/bootconf.

hope this helps a bit.

regards
sujit

[Philip Leenman]

Sorry for the late reply. I was out of office and unable to reply.
I have re-read my initial question and I was not so clear.
The HP-UX cluster is working fine on SAN storage (2 EVAs). The case is to keep both the clusternodes AND the EVA with all the boot/data LUNs for the HP-UX nodes. There is no new storage! The only things that need to be moved are the EVA ports from the old FC switches to the new switches (we have 2 fabrics)with new domain IDs and different ports. The host FC-connections will keep the switch ports they have now.

[Steven E. Protter]

Shalom,

I always advise against booting from the SAN. If there is a SAN problem, you are diagnostic free.

You may be able to use EVA utilities on the controller, to replicate the disk EVA to EVA, then change the boot path and life a few commands from my first post, the link.

SEP

[Michal Kapalka (mikap)]

hi,

i'm the same opinion as SEP, data on SAN is ok, but the system is better to have on local disks.

mikap