topic Re: upgrade root disk in Operating System - HP-UX

upgrade root disk

SM_3 — Wed, 28 Aug 2002 10:14:21 GMT

I have a K580 server running 10.20. My root disk is a 2GB spindle mirrored to another 2GB spindle. All the root partitions are nearing their full capacity and there are no more spare extents to extend current filesystems. I want to upgrade my root disk to a 9GB spindle. Can I add a 9Gb spindle in root vg and make boot utilities on the new disk and mirror all root partitions on 9GB disk. Remove the 2GB mirror and add a 2nd 9GB spindle and repeat procedure as in 1st new disk to upgrade system to 9GB disks. Would this operation work and is it supported by HP ?

Re: upgrade root disk

harry d brown jr — Wed, 28 Aug 2002 10:24:16 GMT

THat would be such a waste of time and VERY prone to ERRORS.

Do this:

Get the latest version of ignite.

do TWO make_tape_recovery's.

Shut system down, install TWO new 9GB or 18GB drives.

Boot system FROM TAPE!!!!

Rock and roll!!!

And don't forget to set up your mirroring again, as make_tape_recovery will NOT do it for you!

live free or die
harry

Re: upgrade root disk

Paula J Frazer-Campbell — Wed, 28 Aug 2002 10:33:27 GMT

HI

In addition be aware that 10.20 will not be supported soon - perhaps now is the time to install 11 ??

Do both jobs at once?

Paula

Re: upgrade root disk

Paula J Frazer-Campbell — Wed, 28 Aug 2002 10:37:15 GMT

Ignite Here:-

http://www.software.hp.com/products/IUX/download.html

/opt/ignite/bin/make_tape_recovery -x inc_entire=vg00 -I -v -a /dev/rmt/1mn

Will make an ignite of vg00 - N.B. Change the device file to suit.

HTH

Paula

Re: upgrade root disk

James R. Ferguson — Wed, 28 Aug 2002 10:47:22 GMT

Hi:

The first problem is that of 'max_pe'. If you 'vgextend' your 9GB disk into the volume group built from a 2GB disk, unless you took provisions to specify a non-default 'max_pe' value originally, you will *not* have access to over half of the new physical disk.

The value of 'max_pe' is set and fixed during volume group creation. The default is 1016 4-MB extents or the number of physical extents on the largest volume initially used.

The easist way to circumvent your problem is to make an Ignite recovery tape and use it to reinstall your vg00. Choose the advanced installation mode when you boot from your Ignite tape. You will be able to resize your filesystems according to your taste and needs.

Download a current copy of Ignite from here:

http://www.software.hp.com/products/IUX/download.html

Use this to create a tape archive for all of vg00:

# make_tape_recovery -x inc_entire=vg00 -I -v -a /dev/rmt/0mn

The '-I' option will offer an interactive Ignite recovery session when you boot from this tape.

As already suggested, I too would urge you to consider an update (cold install) of 11.x if possible. The Ignite recovery tape would obviously be wise insurance in that instance too.

Regards!

...JRF...

Re: upgrade root disk

Trond Haugen — Wed, 28 Aug 2002 11:20:03 GMT

Follow Harrys advise. A problem you would probaly run into adding a 9Gb would propably be that max PE pr PV is set to utilize only 2Gb of your new disk.
Another thing I would suggest is to considder upgrading (reinstalling realy) to 11.x as 10.20 will be obsoleted June 30, 2003.

Regards,
Trond

Re: upgrade root disk

SM_3 — Wed, 28 Aug 2002 11:26:59 GMT

Many thanks for your input. I will use ignite to upgrade the root disk. Further to my original query, why would my original plan not work even if the max_pe per pv was set for VG00

Re: upgrade root disk

harry d brown jr — Wed, 28 Aug 2002 11:27:02 GMT

I think I would upgrade the DISKS first to at least the 9GB ones, THEN a little while later INSTALL 11i (11.11).

THe reason I would do this is so I would have enough disk space to clean things up on my 10.20 system before INSTALLING 11.11 (NOTE --> DO NOT USE UPGRADE OPTION - INSTALL ONLY).

live free or die
harry