topic Re: lvextend Not enough free PE in Operating System - HP-UX

lvextend Not enough free PE

Burt Buchen — Thu, 09 Aug 2007 16:29:12 GMT

Hello,

I am trying to extend a raw datafile that is
mirrored. I get the following error:

lvextend -L 3500 /dev/vg02/BtsCDISi1 pvg3
lvextend: Not enough free physical extents available.
Logical volume "/dev/vg02/BtsCDISi1" could not be extended

I have attached a file that has the lvdisplay and /etc/lvmtab.
Is it possible to extend this lv?
I read some things saying that the problem is that the lv is strict-allocated. Is there any workaround?

Re: lvextend Not enough free PE

Sandman! — Thu, 09 Aug 2007 16:53:43 GMT

What does your /etc/lvmpvg look like? Could you post it here.

~thanks

Re: lvextend Not enough free PE

tkc — Thu, 09 Aug 2007 21:12:21 GMT

Your /dev/vg02/BtsCDISi1 is distributed into 4 disks with following setting :
Allocation PVG-strict/distributed

--- Distribution of logical volume ---
PV Name LE on PV PE on PV
/dev/dsk/c4t6d0 375 375
/dev/dsk/c4t8d0 375 375
/dev/dsk/c6t6d0 375 375
/dev/dsk/c6t8d0 375 375

Have you check the /etc/lvmpvg file that you have all the 4 disks in this pvg3?

Re: lvextend Not enough free PE

skt_skt — Thu, 09 Aug 2007 21:41:56 GMT

check all the disks has enough free PE ..

Re: lvextend Not enough free PE

tkc — Thu, 09 Aug 2007 22:53:10 GMT

/dev/vg02/BtsCDISi1 info :

LV Size (Mbytes) 3000
Current LE 750
Allocated PE 1500

PV Name /dev/dsk/c4t6d0
Total PE 8681
Free PE 901

PV Name /dev/dsk/c4t8d0
Total PE 8681
Free PE 901

PV Name /dev/dsk/c6t6d0
Total PE 8681
Free PE 901

PV Name /dev/dsk/c6t8d0
Total PE 8681
Free PE 901

There should be sufficient PE for your lvextend to 3500MB. This is most likely due to lvmpvg for your pvg3.

Re: lvextend Not enough free PE

Burt Buchen — Fri, 10 Aug 2007 09:15:28 GMT

Here is the /etc/lvmpvg.
VG /dev/vg01
PVG pvg1
/dev/dsk/c4t0d0
/dev/dsk/c4t1d0
/dev/dsk/c4t2d0
/dev/dsk/c4t3d0
/dev/dsk/c4t4d0
/dev/dsk/c4t5d0
PVG pvg2
/dev/dsk/c6t0d0
/dev/dsk/c6t1d0
/dev/dsk/c6t2d0
/dev/dsk/c6t3d0
/dev/dsk/c6t4d0
/dev/dsk/c6t5d0
VG /dev/vg02
PVG pvg3
/dev/dsk/c4t6d0
/dev/dsk/c4t8d0
PVG pvg4
/dev/dsk/c6t6d0
/dev/dsk/c6t8d0

Re: lvextend Not enough free PE

James R. Ferguson — Fri, 10 Aug 2007 09:24:24 GMT

Hi Burt:

# lvextend -L 3500 /dev/vg02/BtsCDISi1 pvg3 pvg4

Regards!

...JRF...

Re: lvextend Not enough free PE

Burt Buchen — Fri, 10 Aug 2007 09:35:19 GMT

That makes sense. After I perform the lvextend with pvg3 and pvg4 I don't need to remirror them with the lvextend -m 1 correct?

Thanks,

Re: lvextend Not enough free PE

James R. Ferguson — Fri, 10 Aug 2007 09:42:13 GMT

Hi Burt:

When you have a mirrored logical volume, an 'lvextend' automatically handles the mirror. The specification of a pv_path or a pvg_name is entirely optional. The logical volume path and a size are all that are necessary.

Regards!

...JRF...

Re: lvextend Not enough free PE

Burt Buchen — Fri, 10 Aug 2007 09:51:59 GMT

That was it. Thanks. It makes sense to me.
I thought I might have to break the mirror then
remirror it but this is the correct way.

Thanks again

Burt

Re: lvextend Not enough free PE

Burt Buchen — Fri, 10 Aug 2007 09:53:03 GMT

Thanks again