topic Re: Replace root disk. in Operating System - HP-UX

Replace root disk.

AnthonySN — Sat, 10 May 2008 11:43:42 GMT

We need to replace the root disk which is 72gb with 300gb disk.

My plan was to take an ignite and restore it on the new 300 gb disk but ignite has a limitation of not backing up files more than 2 gb in size.
other option is to remove mirrored 72 gb disk and replace it with 300 gb disk and follow the below steps.
1.mv /etc/lvmtab /etc/lvmtab.old
2.pvcreate -f -B /dev/rdsk/newdisk.
4.mv /etc/lvmtab.old /etc/lvmtab
5.vgcfgrestore -n vg00
6.vgchange -a y /dev/vg00
7.vgsync vg00
8.mkboot /dev/rdsk/newdisk
9.mkboot -a "hpux -lq" /dev/rdsk/newdisk
10.lvlnboot -Rv /dev/vg00

after this replace the other 72 gb disk with a 300 gb and repeat the above process.

pls suggest any alternative or better method to do the same.

Re: Replace root disk.

James R. Ferguson — Sat, 10 May 2008 13:36:00 GMT

Hi:

Follow the boot disk replacement steps in this guide:

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01911837/c01911837.pdf (BSC link updated by admin)

The advantage to the replacement strategy is that you are using mirroring to perform the data replication needed with none to minimal downtime.

You don't offer the release on which you are running. If it is 11.23 or later, you have the 'vgmodify' command available should you need to increase the value of the 'max_pe' to accomodate using the full space that a 300GB disk offers.

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01920387/c01920387.pdf (BSC link updated by admin)

In the event that you are pre 11.23, you *may* need to evaluate using Ignite to re-install your boot disk. This would be necessary to fully utilize all disk physical extents on your new disk, should your existing LVM geometry not allow the use of all extents.

Regards!

...JRF...

Re: Replace root disk.

Steven E. Protter — Sat, 10 May 2008 16:41:59 GMT

Shalom,

I'd suggest taking an ignite make_tape_recovery or make_net_recovery backup.

Then boot the system with the new disk installed and recover from the backup. There is a step that lets you intervene and set file system sizes to the levels you want.

SEP

Re: Replace root disk.

Shrikant Lavhate — Sat, 10 May 2008 17:36:10 GMT

Hi,

Some same threads:
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1228068
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1216923
http://forums11.itrc.hp.com/service/forums/questionanswer.do?threadId=1222827