Adding disks to VG and Extending Stripped LV

[Michael Steele_2]

Hi Folks:

I have to add 4 disks to a volume group and lvextend a stripped logical volume: Its file system is at 94%.

vgextend /dev/vg /dev/dsk/c#t#d#, etc.
lvextend -L ### /dev/dsk/c#t#d#, etc.

Anything missing?

No mirrors, strict allocation, stripe size = 32 KB.

[Martin Johnson]

Remember to extend the file system too!

Marty

[James R. Ferguson]

Hi:

You can extend a striped logical volume as long as the same number of disks over which you are already striped are used to extend the logical volume.

Regards!

...JRF...

[Pete Randall]

pvcreate first?

Pete

[Sridhar Bhaskarla]

Yes.

extendfs -F vxfs /dev/vg0#/rlv#

If you have OnlineJFS, then it would be

fsadm -b size_in_kb /mount_point

-Sri

[Deshpande Prashant]

Hi
If you have used the PVG in existing volume group you may want to specify the same while extending the VG.
3vgextend -g PVG0 /dev/vgX /dev/dsk/cxtydz...

Thanks.
Prashant

[Michael Steele_2]

James, you said:

You can extend a striped logical volume as long as the same number of disks over which you are already striped are used to extend the logical volume.

I am at 94% full on a vxfs file system and need to add four addional disks because four is the current number used in the logical volume. I'll end up with 8 disks in the logical volume. Are you saying I can't do this and then lvextend over the newly added four disks?

[James R. Ferguson]

Hi (again):

No, I am saying that if you are already stripped over four physical volumes, then you will need physical extents on *four* physical volumes again. If your logical volume spans four disks without any free extents, then add ('vgextend') four physical disks and 'lvextend' the logical volume to them.

Regards!

...JRF...

[Deshpande Prashant]

Hi
I also use stripped lvs on my systems with 4 PVs in it.
To make sure no one adds odd number of disks in VG I restrict the VG to max 4PVs. while creating. Make sure you do not have such imposed limitation in your VG.

Just a thought.
Prashant.

[Michael Steele_2]

.