increase the PE extents

[gany59]

Hello,
how to increase the PE extents size, if i need to increase from 4 to 16MB what is the procedure on that.

Thanks!

[Manix]

Hey !!
AFAIK it`s not possible i don`t think even 'vgmodiyf' can do it.

http://www.unix.com/man-page/all/1m/vgmodify/

You can increase other parameters like PE/PV
to get more space ,that too on 11iv2 & v3 with
vgmodify

Thanks
Manix

[Manix]

Do read this good stuff.

Using the vgmodify command to perform LVM VolumeGroup Dynamic LUN Expansion (DLE) and Contraction(DLC)

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01920387/c01920387.pdf?jumpid=reg_R1002_USEN

Thanks
Manix

[satheeshnp]

Its difficult to increase the PE extend size using vgmodify if you are using LVM 1 version.

We can do the same in LVM 2 version.

[Jose Mosquera]

Hi,

If your HP-UX version, or LVM version do not support this command feature (vgmodify), then you must define PE size at VG creation moment:
#vgcreate -s 16 vgname /dev/dsk/cntndn...

Where -s [nn] will be your desired PE size.

Rgds.

[Ismail Azad]

Hi gany,

Traditionally LVM had some "cast in concrete" attributes. Max PVs, Max LVs and extent size were some of those. Then after some time came vgmodify with the -p and -l and -e and many more options.

However, I really agree with most of the forumers. Increasing "extent size" is still a "cast in concrete" attribute which means once set, it cannot be increased.

However, you can increase the maximum "number of extents" cez mathematically in terms of that pool of space something is possible then. Don't forget to assign appropriate points gany.

Regards
Ismail Azad