topic Re: HPUX 10.20: Moving Logical Volumes in Operating System - HP-UX

HPUX 10.20: Moving Logical Volumes

LG Porter — Mon, 20 May 2002 19:00:08 GMT

I have a K-Class server that I had to rebuild using a "make recovery" tape. I need to mirror root volume group (vg00). When the make_recovery restored the logical volume structure, /usr is now located on a different disk than my primary mirror. Is there a method to moving logical volumes around to different disks within vg00? If so, can this be done at rn level 3?

Re: HPUX 10.20: Moving Logical Volumes

Patrick Wallek — Mon, 20 May 2002 19:04:27 GMT

Yes you can move LVs between disks within a VG. Have a look at the 'pvmove' command.

This command would move /dev/vg00/lvol7, my /usr, from the /dev/dsk/c1t2d0 to /dev/dsk/c1t1d0:

# pvmove -n /dev/vg00/lvol7 /dev/dsk/c1t2d0 /dev/dsk/c1t1d0

Yes you can do this while the machine is up in run-level 3.

Re: HPUX 10.20: Moving Logical Volumes

S.K. Chan — Mon, 20 May 2002 19:07:04 GMT

Use pvmove but before that the rules of a "pvmove" is that it can be used while your extents are active (meaning at multi-user mode) provided this is NOT true ..

a) Disk stripping is used on the LV.
b) vg00 is in shared mode (eg: MC/Service Guard setup)

The command would be ..

# pvmove -n /dev/vg00/lvolX /dev/dsk/ /dev/dsk/

Re: HPUX 10.20: Moving Logical Volumes

Sanjay_6 — Mon, 20 May 2002 19:07:13 GMT

Hi,

As Patrick has suggested, you should be able to use the pvmove command to move the lv from some other disk to the primary root disk provided you have enough disk space over there. You can do this at run level 3.

Hope this helps.

Regds

Re: HPUX 10.20: Moving Logical Volumes

Helen French — Mon, 20 May 2002 19:10:15 GMT

Hi Porter:

As Patrick suggested, you can use 'pvmove' command for doing this task. Before that I would check if free space available on the destination disk:

# pvdisplay -v pv_name

Normally, while recovering with the ignite tape, the LVs will be created on the same order and location if the hardware didn't changed.

HTH,
Shiju

Re: HPUX 10.20: Moving Logical Volumes

MANOJ SRIVASTAVA — Mon, 20 May 2002 19:19:57 GMT

Hi LG Porter

Yes you can move it in runlevel 3 , use pvmove command like

pvmove -n /dev/vg00/lvol*

Manoj Srivastava

Re: HPUX 10.20: Moving Logical Volumes

PIYUSH D. PATEL — Tue, 21 May 2002 20:20:24 GMT

Hi,

You can definitely issue the pvmove command as suggested on the run level 3.
Just check for the free PE on the destination disk before moving the lv.

Piyush

Re: HPUX 10.20: Moving Logical Volumes

Noel Miranda_1 — Fri, 24 May 2002 10:22:34 GMT

Hi

Moving logical volumes from onde disk to the other can be achieved using the pvmove command...basically this is related to performance issue...the syntax of the command is as follows ...

pvmove -n

for eg:

pvmove -n /dev/vgxx/lvox /dev/dsk/cxtxdx /dev/dsk/cytydy..

but HP doesnt recommend it...

Regards
Neol

Re: HPUX 10.20: Moving Logical Volumes

Noel Miranda_1 — Fri, 24 May 2002 10:22:41 GMT