Increasing root disks to 2 x 9Gb's

[Russell Gould]

Hello everyone,

Please could I request your ideas .....

I have the following setup

We are running 10.20 on a K570. I need to increase size of some vg00 areas ???.

The o/s currently sits on 2 x 2Gb disks internal to the K, mirrored onto 1 x 4Gb disk in a HASS unit

What I want to do is replace the 2 x 2Gb internal disks with 2 x 9Gb???s and have the o/s mirrored across them

My question is how to go about doing this :

I have two suggestions and would like to know which is best ???..

1/ I could reduce the 4Gb out of the root mirror leaving it on the 2 x 2Gb???s and perform an Ignite UX backup to DLT. Then when complete, I could replace the 2 x 2???s with 2 x 9???s, lay down the o/s from DLT to one of the 9???s and when complete, mirror across to the other 9.

2/ Reduce the 2 x 2Gb???s out of the root mirror, replace the 2 internal 2???s with 9???s. Mirror the existing 4 across onto one of the 9???s, reduce the 4Gb out of the mirror (leaving the o/s on one of the 9???s), then mirror onto the remaining 9. This would involve

Looking at vgdisplay for vg00, max PE per PV is only 2000, so I imagine that I???ll need to go option 1, as I???ll be using 9Gb disks. Can anyone confirm whether you can increase max PE per PV using an Ignite recovery ??? is it an advnaced option or something ?

I am a little scared about the following :
In option 1, telling it to lay down the o/s onto 1 x 9Gb disk having come from 2 x 2Gb???s
In option 2, extensive lvsync commands which can take ages in my experience (I only have a small timeframe in which to complete this work).

Any advice would be appreciated, thanks in advance.

Russell

[Stefan Farrelly · Accepted solution]

Ignite is the way to go. It will let you increase the Max PE per PV to match whatever drive you install it onto - ie. your 9Gb drive.
There is no need to reduce anything, ignite wont restore mirroring anyway, you will need to manually switch this on after the ignite restore.

The ignite restore is the fastest way to go, as for the mirroring this can be done online after everything is up and running (and users on) so this way your downtime is at a minimum.

[Carlos Fernandez Riera]

The first think you must check is the Maximun Physical Extensions by Physical Volume.


If This value is lower that 2000 you will need recreate your vg00.


Ignite is the best way to do this. Run your ignite make_recovery. Reboot and Stop the automatic process when Ignite asks for. Go to advanced instalation and select the 9GB disk.


Good Luck.

[Martin Burnett_2]

Hello Russell,

Check the document UIUXKBRC00010068 in the knowledge base for the exact procedures you need.

Thanks for participating in the forums,

Martin
Chaos reigns within. Reflect, repent, and reboot. Order shall return.

[Pete Randall]

Russell,

1. Make your Ignite tape.

2. Shutdown

3. Install the new drives

4. Boot from your Ignite tape and re-load.

Pete

[Pete Randall]

Oops - left out:

5. Re-establish mirroring.

Pete