topic Re: mirror not from root disk in Operating System - HP-UX

mirror not from root disk

Rob O'Connor — Wed, 23 Jul 2003 13:44:16 GMT

Hello:
We are getting new machine.
I just need to verify mirroring syntax for non root disk. The disks does not have to be bootable.

pvcreate -f /dev/dsk/cxtxdx
vgextend -f /dev/vg04 /dev/dsk/cxtxdx
lvextend -m 1 /dev/vg04/lvol1 /dev/dsk/cxtxdx

Thanks,
Henry

Re: mirror not from root disk

Steven E. Protter — Wed, 23 Jul 2003 13:46:33 GMT

pvdisplay -v /dev/rdsk/cxtxdx | more

for the disk

lvdisplay -v /dev/vg01/lvol1 | more

This will show you the mirrors and what disk they are on.

SEP

Re: mirror not from root disk

Patrick Wallek — Wed, 23 Jul 2003 13:48:09 GMT

Yes, that will work. You will also want to make sure that the LVs are created with the Strict allocation policy. That will prevent you from mirroring to the same disk.

When you create an LV you need to specify the '-s y' switch. Or if the LV is already created you can use lvchange to modify that setting.

Re: mirror not from root disk

twang — Wed, 23 Jul 2003 14:08:03 GMT

Your steps are right, but remember to back up LVM configuration information for the volume group you changed, for example
# vgcfgbackup /dev/vg04