Disk Mirroring of root volume group

[Kenneth Woolard]

Planning to do an upgrade of PowerPath on a HP 9000/800 series running 11.11i. This has a mirrored root VG and I plan to break it prior to the change.
I would use lvsplit on all the LV's on VG00 and when change has been completed do a lvmerge to reinstate the mirroring. That's fine if change goes ok but I want to put a recovery plan in place (excluding ignite) where I can boot of the mirror that I just broke via lvspilt command.
However I can't boot off this as it will be renamed i.e lvol1b whereas the lvlnboot will be showing lvol1b. Solution may be to use lvlnboot commands to change to alternative split LV.

Basically all I want to do is in case of a problem - reset system, interrupt and # boot alt - at ISL go to single user hpux -is.
Then try and resync the data on the alternate disk back to the primary.
When complete setboot back to primary.

Any ideas?

[SANTOSH S. MHASKAR]

Hi,

Why don't u plug out one of the disk say Disk A and do ur
R & D on other disk say Disk B.
The server disks are hot-pluggable,

U can do like this.

Pull out one of the mirrored disk (disk A)
after shutting down the server.

Boot with option
ISL> hpux -lq

After system is up, do the upgradation on disk B.

Scene 1]
If every thing is fine plug-in disk A and do
a vgsync.

Scene 2]

If some problem comes

Do a shutdown, plug-out disk B, boot with disk A.
After system is up, plug-in disk A and do a
vgsync.


-Santosh

[SANTOSH S. MHASKAR]

Sorry for Typo,

read

After system is up, plug-in disk B and do a
vgsync.

instead of

After system is up, plug-in disk A and do a
vgsync.

in Scene 2]


-Santosh