mirror problem

[karan_3]

hi
Today i add one hardisk in mirror group .actually i replaced the faulty hardisk in root mirror volume group vg00. i have done every- thing succesfully . after resync when i try to give the command LVLNBOOT -V . the output of the command are as follow.

Boot Definitions for Volume Group /dev/vg00:
Physical Volumes belonging in Root Volume Group:
/dev/dsk/c1t2d0 (0/0/1/1.2.0) -- Boot Disk
/dev/dsk/c2t2d0 (0/0/2/0.2.0) -- Boot Disk
Boot: lvol1 on: /dev/dsk/c2t2d0
Root: lvol3 on: /dev/dsk/c2t2d0
Swap: lvol2 on: /dev/dsk/c2t2d0
Dump: lvol2 on: /dev/dsk/c2t2d0, 0


Now i want to know why it is not showing the first harddisk and what happen if the first harddisk will not show in this command.and if it is urgent for booting then why my system still running even i boot from primary disk.


thanks $ regard
karan

[RAC_1]

You missed something somewhere. Alternate /, swap and root are also not shown.
The faulty disk procedure should be as follows.

vgcfgrestore -n /dev/vg00 /dev/dsk/cxtxdx
vgchange -a y vg00
mkboot /dev/dsk/cxtxdx
mkboot -a "hpux -lq (;0)/stand/vmunix" /dev/rdsk/cxtxdx
vgsync

Now check with lvlnboot and by checking mirror copies and doing lifls, lifcp /dev/rdsk/cxtxdx:AUTO -

Anil

[A. Clay Stephenson]

Did you do an lvlnboot -R? I assume that you did a vgcfgrestore rather than a pvcreate.

[A. Clay Stephenson]

You may have left out the mkboot steps.

[karan_3]

thanks to all
yes Mr. A. Clay Stephenson i forgot the step lvlnboot -R /dev/vg00. but i am not able to understand the step ar as follow:

what happen if the first harddisk will not show in this command.and if it is urgent for booting then why my system still running even i boot from primary disk.

[Mel Burslan]

I think, if I am understanding wht you are saying correctly, after running the command lvlnboot -R /dev/vg00 you started to see the second disk under Boot/Root/Swap/Dump lines. Is this right ? If yes, you are just wondering what could happen if you did not make them show up and the only showing disk failed. If this is the question, the answer is very simple to that : your system would not boot. you would come to the ISL prompt and stop there as the system do not know a boot device, i.e., where to read the /stand/vmunix from.

But if you see both the root and the mirror devices together under all 4 lines, you should not worry.

If you have not run this command yet, I would strongly recommed running it at once:

mkboot -b updatediaglif2 -p ISL -p AUTO -p HPUX -p LABEL /dev/rdsk/c1t2d0

(on a footnote here: please show your appreciation by assigning points to the answers which helped you solve your problems rather than thank you messages. For understanding points system, please visit this link:
http://forums1.itrc.hp.com/service/forums/helptips.do?#28)

[vinod_25]

hi karan

/dev/dsk/c1t2d0 is the disk u changed in a root mirrored vg... the steps are as follows..

1)boot in lvm maintenance mode
ISL> hpux -lm
2)do vgcfgrestore to restore LVM config data from config backup to Pv
# vgcfgrestore -n vg00 /dev/rdsk/c1t2d0
3)Activate the Vg
# vgchange -a y vg00
4)use mkboot to put boot utilities and Auto file in LIF area
# mkboot -l /dev/rdsk/c1t1d0
# mkboot -a "hpux" /dev/rdsk/c1t1d0
5)use lvlnboot
# lvlnboot -r /dev/vg00/lvol3 /dev/vg00
# lvlnboot -b /dev/vg00/lvol1 /dev/vg00
# lvlnboot -s /dev/vg00/lvol2 /dev/vg00
# lvlnboot -d /dev/vg00/lvol2 /dev/vg00
# lvlnboot -R
# lvlnboot -v
6) remirror using vgsync
# vgsync
7) Reboot the server in multiuser mode
8) check successful completion by
# lvdisplay -v /dev/vg00/lvolZ
# vgdisplay -v vg00

hope this steps helps you karan...

Good Luck

Vinod

[Victor Fridyev]

Hi,

You can use the attached script. It creates mirroring for system volume group, PA_RISC machines.
In order to use the script, remove the new disk from vg00 (lvreduce for all lv and vgreduce).

HTH