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Modify the PE size in 11.31

rajasekar.m
Advisor

Modify the PE size in 11.31

Hi,

Please let me know how to modify the PE size.

Default - 4 MB, in which condition i need to change the PE size.

what is the command to modify PE size
3 REPLIES
James R. Ferguson
Acclaimed Contributor

Re: Modify the PE size in 11.31

Hi:

You are looking for the 'vgmodify' command, but it can't modify 'pe_size'.

http://docs.hp.com/en/B2355-60130/vgmodify.1M.html

Regards!

...JRF...
Torsten.
Acclaimed Contributor

Re: Modify the PE size in 11.31

Hi,

the pe_size is set during vgcreate ([-s pe_size]), it cannot be changed later.

If you hit the limits, you can increase the max_pe value in 11.23 or 11.31 LVM ver 1.

With LVM ver 2.x you can set a maximum VG size:

"To create a Version 2.0 volume group using 32 MB extents and a maximum size of 1 PB:
# vgcreate -V 2.0 -s 32 -S 1p /dev/vg01 /dev/disk/disk50"

Hope this helps!
Regards
Torsten.

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James R. Ferguson
Acclaimed Contributor

Re: Modify the PE size in 11.31

Hi:

So, if you *must* modify the 'pe-size' of your volume group, simply backup your data; 'vgexport' the volume group [because that's the fastest way to eliminate it]' 'pvcreate' your physical volumes (again); and 'vgcreate' using arguments that create an LVM geometry that better meets your current needs.

But, then you already knew this...

Regards!

...JRF...