change maximum physical volumes

[Stephan Ravare_1]

I need to add some more disk drives to a volume group thats already created, is there a way to increase the maximum physical volumes that are allowed? Without re-creating the volume group?

[MANOJ SRIVASTAVA]

By default the maximum Physical Volume supported are not more than 16 , to increase this value you have to recreate the volume group with -p option , do a man vgcreate .

" -p max_pv Set the maximum number of physical volumes
that the volume group is allowed to contain.
The default value for max_pv is 16. The
maximum number of physical volumes can be a
value in the range 1 to 255.
"


Manoj Srivastava

[Pete Randall]

Unfortunately, no, you'll have to re-create!


Pete

[Helen French]

This parameter can be set only at the creation of the VG. The default is 16 and you can have up to 255.

# vgcreate -p max_pv ....

[Marco Santerre]

Unfortunately, in this case the only answer is no. Whether your Volume Group was created with the default value or with any value at all, if you've reached that limit, the only way out, is to re-create the VG.

[Geoff Wild]

No - as others have stated - you will have to create a new vg.

You will then have to copy the data from old to new.

Take a look at this thread for tips on copying:

http://forums1.itrc.hp.com/service/forums/questionanswer.do?threadId=230811

Rgds...Geoff

[Brian Markus]

It has to be done when you create the VG. The default is 16 and you can have up to 255.

Build an export map file
vgexport -v -p -s -m /ops/vgXX.map /dev/vgXX
back everything up. Once you've done that, then do a regular vgexport to drop it.
create a new vg with the same minor number
mkdir /dev/vgXX
mknod /dev/vgXX/group c 64 0x010000
The 0x010000 being the number of what ever it used to be.
change the VG parm's I belevie it is vgcrate -p
then import the disks back in.
vgimport -v -s -m /ops/vgXX.map /dev/vgXX

I beleive this should do it.

I hope this helps.

-Brian.