topic Re: SAN Boot for HPUX 11.23 in Operating System - HP-UX

SAN Boot for HPUX 11.23

Natesan_1 — Tue, 10 Feb 2004 06:25:46 GMT

Hello we have

RX5670 Server connected thro EMC clarion CX600 SAN storage with dual FC card.(We have confirmed from EMC doc. that external boot of 11.23 supported on CX600 SAN box)

1.We wanted to install the OS on SAN LUN
2. But we would get multiple path thro both FC cards (due to dual Fc card and SP on Storage)

3. While install HPUX 11.23 it is taken only one path.

How to add the additional paths to the system I mean additional path to VG00?.
Since we wanted to check by booting thro additional paths too for achiving FC Card fail-over.

Re: SAN Boot for HPUX 11.23

Mark Grant — Tue, 10 Feb 2004 06:30:04 GMT

Usual way to add the path is to just vgextend the volume group to include the new path. The system knows it's the same LUN.

I personally would feel a bit twitchy about booting off the SAN myself but I know some people do.

Re: SAN Boot for HPUX 11.23

Natesan_1 — Tue, 10 Feb 2004 06:38:01 GMT

Hi Mark,

Thanks for your reply. in hpux 11.23 has three slice of root disk, when u do vgextend do we required to do any thing special for making those slice to appear on alternath path?.

Re: SAN Boot for HPUX 11.23

Mark Grant — Tue, 10 Feb 2004 06:39:18 GMT

Woa!

It looks like you are not using LVM but veritas instead. Apologies for this but am not entorely sure how you do this in this case!

Re: SAN Boot for HPUX 11.23

Natesan_1 — Tue, 10 Feb 2004 07:11:58 GMT

Hi Mark,

It is not VXVM, LVM on HPUX 11.23 (IPF)

Re: SAN Boot for HPUX 11.23

Bernhard Mueller — Tue, 10 Feb 2004 07:18:23 GMT

Hi,

usually you would simply run vgextend for the device file of the alternate path e.g. being c#t#d#s2:
vgextend vg00 /dev/dsk/c#t#d#s2

This is for the default partitioning for LVM root disks and slice 2 being the HP-UX partition. Which should be the case if you install from DVD.

Then run vgdisplay -v vg00 and it will tell you "alternate path" for c#t#d#s2

You can also check lvlnboot -v.

Regards,
Bernhard

Re: SAN Boot for HPUX 11.23

Mark Grant — Tue, 10 Feb 2004 07:24:54 GMT

Oh, in that case, no, you do not need to do anything special, it is all taken care of by the system.

Re: SAN Boot for HPUX 11.23

Natesan_1 — Tue, 10 Feb 2004 07:39:41 GMT

Hi Bernhard,

if we have dont' have the device file for alternate disk like cxtxdxs2. how we do extend?. or u can tell how can we create s2 device file.

Re: SAN Boot for HPUX 11.23

Mark Grant — Tue, 10 Feb 2004 08:03:39 GMT

If you don't have the device paths but you can see them as "CLAIMED" with "ioscan" just do "insf -e -C disk" or if you're feeling nervous "insf -e -H "

Re: SAN Boot for HPUX 11.23

Bernhard Mueller — Tue, 10 Feb 2004 11:52:39 GMT

Hi,

as Mark said you just need to do insf -e to create any missing device files.

If you reboot, this will also do an insf -e. Then you *should* see all your path to your SAN boot disk with all the different device files, e.g /dev/dsk/c4t0d1s2 and /dev/dsk/c6t0d1s2.

All other disks or LUNs should just have the /dev/dsk/c4t0d2 and c6t0d2 device files (without the "slice" addition).

Regards
Bernhard

Re: SAN Boot for HPUX 11.23

Natesan_1 — Thu, 12 Feb 2004 01:00:05 GMT

Hi All,

Thanks for your help, we are able see alternath path for root disk(lun)we extended the vg00 with alternate path.confirmed in the vgdisplay also.

Thanks for once again.

Re: SAN Boot for HPUX 11.23

D Block 2 — Thu, 12 Feb 2004 07:12:14 GMT

when you say, able to see alternative paths, can you explain what command you used ? Thanks.

Re: SAN Boot for HPUX 11.23

Natesan_1 — Fri, 13 Feb 2004 10:59:24 GMT

Tom,

When we rebooted the system, alternate path was able to see from system.

Re: SAN Boot for HPUX 11.23

Donny Jekels — Sat, 13 Mar 2004 13:32:23 GMT

follow the root disk mirro process in detail.