root mirror gone bad

[justin_83]

I was mirroring my root partition and mirrored lvol1, lvol3 but got the following error when I tried to do lvol4
/# lvextend -m 1 /dev/vg00/lvol4 /dev/dsk/c2t6d0
The newly allocated mirrors are now being synchronized. This operation will
take some time. Please wait ....
Logical volume "/dev/vg00/lvol4" has been successfully extended.
Warning: Logical Volume number "1073741827" found on physical volume not found in "/dev/vg00".
Volume Group configuration for /dev/vg00 has been saved in /etc/lvmconf/vg00.conf

Whe I go to the /etc dir it is empty.
Every time I do a mount I get "Memory Fault"

/#lvdisplay -v /dev/vg01/lvol1|more
The version of /etc/lvmtab file is not correct.
Remove /etc/lvmtab file and execute vgscan command to recreate the file.
lvdisplay: "/etc/lvmtab" could not be read into memory.
lvdisplay: Cannot display logical volume "/dev/vg01/lvol1".

[Rita C Workman]

Hi Justin,

You mentioned mirroring your root or boot disk, but you didn't mention if you set this disk up to be bootable before mirroring. Now, what I am thinking may have happened is that somehow your mirror disk got sync'd back to your root...in other words it got sync'd backwards, thus wiping out your root disk. I am hoping you have made ignite tapes (make_recovery), so you can recover from them...

Now I am also adding a thread (... I have used myself and found quite handy) that gives step by step on setting up the mirror boot disk. The only difference is that I don't do them in numerical sequence, I do them in the same order they load up...lvol3,lvol1,lvol8, etc.:

http://forums.itrc.hp.com/cm/QuestionAnswer/1,1150,0x1ffea14d9abcd4118fef0090279cd0f9,00.html

/rcw

[justin_83]

Here are the steps I followed:
1.pvcreate -B /dev/rdsk/c2t6d0 (create bootable PV with -B option)
2.vgextend /dev/vg00 /dev/dsk/c2t6d0 (add PV to existing root VG)
3.mkboot /dev/rdsk/c2t6d0 (put boot utilities in the boot area of new PV)
4.mkboot -a "hpux -lq (0/0/2/1.6.0;0)/stand/vmunix" /dev/rdsk/c2t6d
(add the AUTO file to the boot LIF area)
5.lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c2t6d0 (mirrors root LV's to new disk)
6.continue step 5 for all vg00 logical volumes (determine with vgdisplay -v /dev/vg00|more)