topic Re: lvm prob in Operating System - HP-UX

lvm prob

khilari — Thu, 23 Mar 2006 13:34:23 GMT

Hi guys, well i made a volume group and then i was creating a logical volume and below is what i did and the errors io am getting.

# lvcreate -L 800 -n mcsg vg02
Logical volume "/dev/vg02/mcsg" has been successfully created with
character device "/dev/vg02/rmcsg".
lvcreate: Not enough free physical extents available.
Logical volume "/dev/vg02/mcsg" could not be extended.
Run the "lvextend" command to create space on the Logical Volume.
# lvcreate -L 400 -n mcsg vg02
lvcreate: Logical volume "/dev/vg02/mcsg" already exists.
# lvremove /dev/vg02/mcsg
Logical volume "/dev/vg02/mcsg" has been successfully removed.
Volume Group configuration for /dev/vg02 has been saved in /etc/lvmconf/vg02.co
f
# lvcreate -L 350 -n mcsg vg01
lvcreate: Volume group "/dev/vg01" does not exist in the "/etc/lvmtab" file.
# lvcreate -L 350 -n mcsg vg02
Warning: rounding up logical volume size to extent boundary at size "352" MB.
Logical volume "/dev/vg02/mcsg" has been successfully created with
character device "/dev/vg02/rmcsg".
lvcreate: Not enough free physical extents available.
Logical volume "/dev/vg02/mcsg" could not be extended.
Run the "lvextend" command to create space on the Logical Volume.
# pvdisplay -v /dev/vg02/c6t0d1
pvdisplay: "/dev/vg02/c6t0d1": No such file or directory
Usage: pvdisplay
[-v]
[-b BlockList]
PhysicalVolumePath...

# pvdisplay /dev/dsk/c6t0d1
--- Physical volumes ---
PV Name /dev/dsk/c6t0d1
VG Name /dev/vg02
PV Status available
Allocatable yes
VGDA 2
Cur LV 0
PE Size (Mbytes) 4
Total PE 2
Free PE 2
Allocated PE 0
Stale PE 0
IO Timeout (Seconds) default
Autoswitch On

Now, it says that it doesnt have enough space the disk, and the pvdisplay shows 2 PE'S and 2 free PE'S . Now, y is it showing me with almost none PE'S.???
Thanks.

Re: lvm prob

erics_1 — Thu, 23 Mar 2006 13:37:59 GMT

There are only 2 extents free on that particular disk. Please provide output from vgdisplay -v vg02.

Thanks,
Eric

Re: lvm prob

Pete Randall — Thu, 23 Mar 2006 13:39:32 GMT

What did you put into your vgcreate command? Can you also post the output of "vgdisplay -v vg02"?

Pete

Re: lvm prob

Steven E. Protter — Thu, 23 Mar 2006 13:41:08 GMT

Shalom,

The lv was created but there was not near enough space on disk c6t0d1 for the requested space.

I would run pvdisplay -v on the physical volume and see what is taking up the space.

If its the new lv, then lvremove it and start again.

I always like the two step approach.

I would create it empty and then use lvextend to particular physical disks to lay things out the way I wanted them. Took longer, got better results.

SEP

Re: lvm prob

Sivakumar TS — Fri, 24 Mar 2006 06:33:40 GMT

Hi,

If this is the only PV in VG02, you can create a LV of maximum 8MB in size, since the free PEs available is only 2.

check vgdisplay -v vg02 to get the total FREE PEs in the VG and

try to create a LV of size ( 4*Total Free PEs)

It should wok

Regards,

Siva.

Re: lvm prob

Devender Khatana — Fri, 24 Mar 2006 06:52:38 GMT

Hi,

As mentioned earlier attach vgdisplay -v output for the VG.

HTH,
Devender

Re: lvm prob

Josiah Henline — Wed, 19 Apr 2006 15:30:24 GMT

Run a "diskinfo -v /dev/rdsk/c6t0d1" and check for the physical size of the disk. It may not be the size you are expecting it to be. You may need the LUN recreated to size you are expecting.