How to break the root mirror in Itanium based server

[Sreer]

Hi Gurus,

Could you pls tell me the exact steps for breaking root mirror in Itanium based server.

say The disk to be removed is cxtydz.
I am sure about only first two steps.Could you pls guide to the next steps?

My plan:

1. reduce the mirrored Lvs:

# for i in lvol1 lvol2 lvol3 lvol4 lvol5 lvol6 lvol7 lvol8
> do lvreduce -m 0 /dev/vg00/$i /dev/dsk/c2t1d0
> done

2. reduce vg:

vgreduce /dev/vg00 /dev/dsk/cxtydz


Thnks in advance.
rgds
Sree

[Torsten.]

Steps are almost correct.

On Integrity servers, partition 2 is used by hp-ux.

c2t1d0s2 needs to be used in your commands!!!

NOTE "s2"!

Before removing the disks, use rmsf to remove the device files.

[Michal Kapalka (mikap)]

hi,

Hi Gurus,

say The disk to be removed is cxtydz

hope disk : cxtydz = c2t1d0

My plan:

1. reduce the mirrored Lvs:

# for i in lvol1 lvol2 lvol3 lvol4 lvol5 lvol6 lvol7 lvol8
> do lvreduce -m 0 /dev/vg00/$i /dev/dsk/c2t1d0s2
> done

2. reduce vg:

vgreduce /dev/vg00 /dev/dsk/cxtydz

mikap

[Torsten.]

...

2. reduce vg:

vgreduce /dev/vg00 /dev/dsk/cxtydzs2

[Sreer]

Hello,

Thanks for reply.

Do we need to update the following?

1)lvlnboot -R --need to do?

2)/stand/boot.conf-- need to edit?

3) /EFI/HPUX/AUTO --any modification needed?

Rgds Sree

[Michal Kapalka (mikap)]

hi,

/stand/boot.conf need to be edited,

delete the line where the reduced disk is presented.

mikap

[sujit kumar singh · Accepted solution]

hi

you can run lvlnboot -R as well as edit the file /stand/bootconf to remove the entry pointign to the disk that is being removed.

in case for the remaining disk if this has the boot string as "boot vmunix -lq" in the /EFI/HPUX/AUTO, you can well leave this, this shall not effect anything.

regards
sujit

[Sreer]

Hello Gurus,

Thanks all for your valuable advice.

Now Iam having enough info to break the mirror!

Wishing ahappy new year to all!

regds Sree

[Torsten.]

Keep in mind breaking the mirror this way make the data on the removed disk invalid!