topic Re: LUN increase. in Operating System - HP-UX

LUN increase.

mpua — Fri, 05 Nov 2010 09:06:32 GMT

Hi,

We have a production server with a lot of VGs with SAN (IBM DS) LUNS.
In this case one of the VGs has one PV (on a 250 GB SAN lun).
The Storage folks have increased the capacity of this LUN to 400 GB... but i perform "ioscan -fn" and "insf -e" and I cant see the new size, diskinfo still reports 250...
Whats happening? Any chance of solving this without rebooting the box?

Regards,

Re: LUN increase.

Shibin_2 — Fri, 05 Nov 2010 09:21:43 GMT

What's your OS and version?

If you are using HP-UX 11.31, you can use vgmodify command

# vgmodify -r -E -a ( This is review )

If review is ok, then execute the command without -r

# vgmodify -E -a

If you are having HP-UX 11.23 with vgmodify command installed, the also you can use the above same command.

Re: LUN increase.

Torsten. — Fri, 05 Nov 2010 09:22:52 GMT

A reboot will not change anything, even if SEP will tell this ... ;-)

Most important: What OS is running?

In case of 11.11 - no way other than recreate the VG.

In case of 11.23 - it must be patched to have "vgmodify" available.

In case of 11.23/11.31 you need to use "vgmodify" to adjust the LVM structure.

In case of 11.31 you (maybe) need to use scsimgr too.

Re: LUN increase.

SoorajCleris — Fri, 05 Nov 2010 09:32:26 GMT

Hi,

Add on ,

The document below will explain you perfectly.

"Using the vgmodify command to perform LVM Volume
Group Dynamic LUN Expansion (DLE) and Contraction
(DLC)"
http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c01920387/c01920387.pdf

Regards,
Sooraj

Re: LUN increase.

mpua — Fri, 05 Nov 2010 09:32:37 GMT

We have vgmodify installed but the "-E" option is not working:

sdprdb1@root:/sbin/>vgmodify -r -E -a /dev/vgbackora
Usage: vgmodify
[-e MaxPhysicalExtents]
[-p MaxPhysicalVolumes]
[-l MaxLogicalVolumes]
[-v]
[-n]
[-r]
[-B bootable]
VolumeGroupName {[pv_path] [pv_path] ....}

or vgmodify -o [-v] [-r] [-B bootable] VolumeGroupName {[pv_path] ....}

or vgmodify -t [-v] [-n] [-B bootable] VolumeGroupName {[pv_path] ....}
"E": Illegal option.

Any solution to this??

Re: LUN increase.

Torsten. — Fri, 05 Nov 2010 09:46:11 GMT

You still did not tell the OS!

Re: LUN increase.

mpua — Fri, 05 Nov 2010 09:47:53 GMT

Sorry! HP-UX 11.23

HPUX11i-OE B.11.23.0712 HP-UX Foundation Operating Environment Component

Re: LUN increase.

Shibin_2 — Sun, 07 Nov 2010 07:32:36 GMT

Have you tried with this option?

# vgmodify -r -a -E /dev/rdsk/

If that too not working, something is wrong with your patch version of vgmodify.

Your patch PHCO_35524 or PHCO_40920 is in correct state?

As far as I know, HP-UX 11.23 vgmodify won't support online DLC.

Also noted from your description of error, it is not supporting online DLE. In this case, you need to de-activate VG and use offline DLE.

1. diskinfo
2. vgchange -a n
3. vgmodify -r -e
4. vgchange -a y

Read.
http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01920387/c01920387.pdf

Re: LUN increase.

mpua — Mon, 08 Nov 2010 07:53:24 GMT

I finally solved the situation last Fridays by reading the vgmodify manual one of you posted in this thread, really good and easy to understand.

Thanks!