ignite recovery

[Sean OB_1]

Hello.

I have a machine that has 2x18GB root disks mirrored and I want to swap them out with 36gb disks.

Can I simply create a make recovery tape, down the machine, replace the drives and boot from the recovery tape?

Will that allow me to modify the max PE's for the volume group?

Or is there another way to do this so I fully utilize the space in the 36Gb drives?

TIA,

Sean

[James R. Ferguson · Accepted solution]

Hi Sean:

You are correct. Using Ignite is a prefered method to rebuild vg00 as for instance to adjust 'max_pe'.

The act of Ignite doing a 'vgcreate' will cause the 'max_pe' to default to match the physical volume size, in this case for 36GB disk. If you like, choose the advanced installation tab and adjust the value to your liking.

Remember that Ignite does not support re-mirroring. You will need to do this yourself (at commandline or via a script) after you install.

Regards!

...JRF...

[Patrick Wallek]

JRF hit the nail on the head. A make_tape_recovery tape, or a make_net_recovery archive if you don't have a tape drive handy, is definitely the way to go here.

I have used this method to upgrade OS drives with no problem at all.

Your data VGs will get re-imported automatically, but go ahead and make sure you have a good backup of them anyway.

[Jeff Schussele]

Hi Sean,

Yes, using a recovery tape is the best way to do this.
Don't forget to run it using
-i for make_recovery or -I for make_tape_recovery so that the install can be interactive.

Rgds,
Jeff

[S.K. Chan]

In addition, refer to ..
DOCID=UIUXKBRC00010068
http://www1.itrc.hp.com/service/cki/docDisplay.do?docLocale=en_US&docId=200000062922008
I was going to suggest another method (without using ignite), ie manually duplicating your existing vg00 to a "temporary VG" vgroot with the new 36GB disks but that takes to much work, plus you got to deal with ODE LIF files install, renaming vgroot to vg00 afterwards, etc, etc. So Ignite is truly the way to go.