lvextend doesn`t work

[Andreas Barth]

Hi,

we tried to extend a logical volume and get the following error message:

lvextend -L 200 /dev/vg00/lvol3
lvextend: Not enough free physical extents available.
Logical volume "/dev/vg00/lvol3" could not be extended.
Failure possibly caused by contiguous allocation policy.
Failure possibly caused by strict allocation policy´

The LV is mirrored but on the VG00 are 16MB x 2020 PE`s free, so there are enough free space to extend.

What can be the problem ?

best regards

Andy

[Steven E. Protter · Accepted solution]

Shalom Andy,

Failure possibly caused by contiguous allocation policy.
Failure possibly caused by strict allocation policy´

lvchange -C n /dev/vg00/lvol3

Then try again.

If you are trying to expand root filesystem.

Forget it.

You can't do that.

You have to make an ignite backup of your system boot off of it, intervene manually and restore your system with a larger root fs.

SEP

[James R. Ferguson]

Hi Andy:

This is expected. 'vg00/lvol3' is the root filesystem mountpoint. It's physical extents must be allocated with gaps (contiguously) and cannot mirrored extents cannot occupy the same physical disk volume (strict allocation).

Thus, you are not going to be able to extend it unless you were to move extents from an adjacent logical volume to another area on the disk.

The question really becomes, why do you want to expand the root filesystem? The root ("/") filesystem should be relatively small and contain only directories like '/etc', '/sbin', and '/dev', principally.

Regards!

...JRF...

[Andreas Barth]

Thank for your help

[Sivakumar TS]

Dear Andreas,

lvol3 --> root

should be contigeous always.

ie . PE should be continous.

This is the reason.

With Regards,

Siva.