topic Re: Error: Extend a logical volume size in Operating System - HP-UX

Error: Extend a logical volume size

hboo — Tue, 10 Oct 2006 13:08:48 GMT

Hi all

I tried to extend a logical volume (via sam) and the output was:

lvextend: Not enough free physical extents available.
│pt │
││ aud│ Logical volume "/dev/vg00/appl3" could not be extended. │ │
││ bac│ Failure possibly caused by strict allocation policy

Somebody can help me with this error?
why its generate?
how I can fix this?

Thanks...

Re: Error: Extend a logical volume size

Calandrello — Tue, 10 Oct 2006 13:10:30 GMT

Friend this error this happening because space in the VG does not exist to extender the Lvol

Re: Error: Extend a logical volume size

Pupil_1 — Tue, 10 Oct 2006 13:15:40 GMT

what's the o/p of
lvdisplay /dev/vg00/appl

Re: Error: Extend a logical volume size

hboo — Tue, 10 Oct 2006 13:17:31 GMT

But I have 314 free PE (1256 Mb Approximately) and I was adding only 500 Mb to the Logical volume

Re: Error: Extend a logical volume size

Pupil_1 — Tue, 10 Oct 2006 13:19:50 GMT

the error is because of the allocation policy that has been used in the lv. the o/p of lvdisplay is needed.

Re: Error: Extend a logical volume size

IT_2007 — Tue, 10 Oct 2006 13:20:34 GMT

because your logical volume was created with "strict" allocation policy which is default to make consistency about not to write on same disk.

You won't be able to extend it under this circumstance.

Still if you want to then you need to turn off policy on all logical volumes in that volume group to extend it.

Re: Error: Extend a logical volume size

hboo — Tue, 10 Oct 2006 13:32:59 GMT

How I can to turn off policy on all logical volumes in that volume group??
For this I need to deactivate the vg?
This may can cause error with the application ?

Re: Error: Extend a logical volume size

IT_2007 — Tue, 10 Oct 2006 13:46:09 GMT

lvchange -s n /dev/vgXX/lvolYY

Instead of this doing on all logical volumes, you can split mirror and use pvmove all logical volumes and when you move the required one to be extended, move it and extend it. Once all done, you can mirror it back.

ex: disk1 - primary and disk2 - alternate.

1. break mirror for all logical volumes.
2. pvmove lvol1 , lvol2 .. one at a time.
3. pvmove appl3 and use lvextend command to increase size after pvmove
4. pvmove remaining ones.
5. mirror all logical volumes now.

No harm doing this one. But it takes lot of time to do pvmove depending on the size of logical volumes.

Re: Error: Extend a logical volume size

Sandman! — Tue, 10 Oct 2006 16:00:33 GMT

Reiterating what some have said could you post the output of...

# lvdisplay -v /dev/vg00/appl3

Are your disks striped? striped + mirrored?
lvdisplay could shed more light on your lvextend situation.

thanks!