topic Mirror in Operating System - HP-UX

Mirror

Scott D. Allen — Tue, 06 Jun 2000 18:41:01 GMT

I just added a new disk to my system and want to mirror all my lvols in my vg00 volume group. They are not currently mirrored (as i only had one disk in vg00 previously) and i don't know what steps to take to mirror these lvols.
I did a pvcreate on the new disk and I'm assuming I should do a vgextend to add the pv to the vg00. then do i do an lvextend or what?

--Scott

Re: Mirror

Jag_2 — Tue, 06 Jun 2000 18:54:34 GMT

1) Pvcreate -B /dev/rdsk/c3t6d0
The -B option is used to create a bootable Physical Volume.

2) Mkboot /dev/rdsk/c3t6d0
Make sure to use the character device file when using mkboot.

3) Mkboot -a "hpux -lq (;0)/stand/vmunix" /dev/rdsk/c3t6d0

4) Vgextend /dev/vg00 /dev/dsk/c3t6d0
This adds the Physical Volume to the root volume group

5)
lvextend -m 1 /dev/vg00/lvol1 /dev/dsk/c3t6d0
This command extends the mirror to the specified Physical Volume.
*NOTE: The lvextend command has to be done on all logical volumes on the primary disk.
This means that lvextend has to be done on lvol1 -> lvolX. This also includes
/dev/vg00/lvol2, which by default is primary swap. Lvol1 must be the first logical volume Mirrored; if it is not, then you will not be able to boot from the mirror.

6) lvlnboot -r /dev/vg00/lvol3 Specifies the root logical volume.

7) Lvlnboot -s /dev/vg00/lvol2 Specifies the swap logical volume To determine where the swap logical volume is located Use the swapinfo command.

8) Lvlnboot -d /dev/vg00/lvol2
Specifies the dump logical volume

9) lvlnboot -b /dev/vg00/lvol1
Specifies the boot logical volume

10) lvlnboot -R
Recovers any BDRA info

11) lvlnboot -v
Verify boot, root, swap and dump settings.

12) setboot
This will display the Primary and Alternate boot paths that are currently set.

13) setboot -a mirror_disk_hardware_address
Changes the Alternate Boot Path to the path of the Root Mirror.

14) shutdown -r now
Shut down the system and boot from the mirror disk.

Re: Mirror

Scott D. Allen — Tue, 06 Jun 2000 19:53:13 GMT

Thanks Jag. I'll give it a try and let you know how it goes!

--Scott

Re: Mirror

CHRIS_ANORUO — Wed, 07 Jun 2000 09:01:03 GMT

Try this link scott.
http://docs.hp.com/dynaweb/hpux10/@Generic__CollectionView?DwebQuery=MirrorDisk%2FUX

Re: Mirror

Joao_Choon — Wed, 07 Jun 2000 14:17:46 GMT

Hello,

should we always do the mirror like this ?
why ?

- lvextend -m 1 lvol1 (boot)
- lvextend -m 1 lvol3 (root)
- lvextend -m 1 lvol2 (swap > 2GB)

why should we change the order lvol1, lvol3, lvol2

thanks