breaking root mirror - bad results

[Nora Chiu_1]

Just an FYI -

I successfully broke the root mirror on my system
last week after I spoke to you all.

However, I rebooted the system this weekend
and that's when the mayhem began, I got the
following error and then the system panicked:

vgchange: Couldn't activate volume group "/dev/vgXXX":
I/O error while reading the VGDA.

The system would only boot in maintenance mode!
After several hours with HP Support, the system
was deemed unrecoverable and I had to restore
from tape.

After some preliminary research I found that there is
a bug with mirrored logical volumes that have mirrored write cache enabled which is addressed
in the latest LVM cumulative patch.

--Nora

[Sanjay_6]

Hi Nora,

Seems like you are unable to boot because of the quorum problem. When booting disable the quorun.

Interrupt the boot process, boot thru primary disk and interact with IPL
IPL>hpux -lq (;0)/stand/vmunix

you should be able to boot into multiuser mode.

Hope this helps.

thanks

[Nora Chiu_1]

yeah, I tried that, it didn't work.

[Sanjay_6]

Hi Nora,

Have a look at the thread below.

http://us-support2.external.hp.com/cki/bin/doc.pl/sid=fed1fb5e005b73a454/screen=ckiDisplayDocument?docId=200000054495554

Try this out if you can.

thanks

[James R. Ferguson]

Hi Nora:

The corruption that Sanjay notes is addressed as follows:

in 11.11 - PHKL_24779 (superseding PHKL_23507)
in 11.0 - PHKL_25118 (superseding PHKL_23127)

See the patch text appropriately.

Regards!

...JRF...