topic Re: lvol strict/contiguous in Operating System - HP-UX

lvol strict/contiguous

Javier Ortiz Guajardo — Mon, 07 Jul 2003 15:51:48 GMT

I have the logical volume /dev/vg00/lvol7, it belongs to filesystem /usr and it is defined with the allocation strict/contiguous. I need to increase it, but send me this message
lvextend: Not enough free physical extents available.
Logical volume "/dev/vg00/lvol7" could not be extended.
Failure possibly caused by contiguous allocation policy.
Failure possibly caused by strict allocation policy

how can i change the strict/contiguous definition to this logical volume?

Thanks
Regards..

Re: lvol strict/contiguous

Pete Randall — Mon, 07 Jul 2003 15:56:21 GMT

Javier,

The strict/contiguous policies are defined during lv creation (see man lvcreate). The only way to change the policy is to re-create the logical volume. Perhaps you could create a new logical volume of sufficient size, mount it as /newusr, copy the contents of /usr into it, the switch the mount points for /usr and /newusr in /etc/fstab and reboot?

Pete

Re: lvol strict/contiguous

James R. Ferguson — Mon, 07 Jul 2003 15:56:50 GMT

Hi:

You can use 'lvchange' (with certain restrictions as described in the man pages for the command) to change these policies. Do a 'man lvchange' for more information.

Regards!

...JRF...

Re: lvol strict/contiguous

Pete Randall — Mon, 07 Jul 2003 15:59:47 GMT

Duh!!! Thanks, James, for pointing out the obvious.

Pete

Re: lvol strict/contiguous

William Wong_2 — Mon, 07 Jul 2003 16:00:17 GMT

Actually I believe as long as it's not one of the swap partitions which has a requirement of being contiguous you can change the policy with lvchange -C n /dev/vg00/lvol7.

Re: lvol strict/contiguous

Steven E. Protter — Mon, 07 Jul 2003 16:01:13 GMT

lvchange seems interesting, never tried it.

I always lvremove and re-create to get around this.

If its /stand or / and is hard to remove, you can do this:

make_tape_recovery

boot off the tape.

Press the key when prompted to interact with the recovery. Increase sizes then.

This should only be done if the logical volume can not be removed/recreated through normal means.

lvchange -C n /dev/vg00/lvol7

This would be my first try, just because it looks like fun.

SEP

Re: lvol strict/contiguous

S.K. Chan — Mon, 07 Jul 2003 16:02:08 GMT

Simply ..
# lvdisplay /dev/vg00/lvol7|grep Allocation
Allocation strict/contiguous
# lvchange -C n /dev/vg00/lvol7
Now the lvdisplay will only show ..
Allocation strict

Re: lvol strict/contiguous

Suresh Patoria — Tue, 08 Jul 2003 02:58:37 GMT

Hi,

Following command may be help you,

lvchange -C n /dev/vg00/lvol7

then you try to extend your logical volume

Re: lvol strict/contiguous

Ivajlo Yanakiev — Tue, 08 Jul 2003 07:20:12 GMT

if you have not online JFS ?
start your server in single user mod and see that /usr is unmount
OTHERWISE unmount /usr and then use lvchange.