Volume Group Extending....

[Dave Cast]

Can a volume group be extended ****WITHIN**** the SAME disk (yes, I know you can extend by adding a DIFFERENT disk) once created?

[James R. Ferguson]

Hi Dave:

On 11.23 (with patches) and on 11.31 you have 'vgmodify' to fiddle with the attributes of an existing volume group.

Regards!

...JRF...

[Dave Cast]

Hmmmm - that's sounds like it has a potential for being ugly....being even more ugly now that I've read the man page on vgmodify....

Generally speaking it doesn't sound like there's an 'easy' (smh doesn't have the option to extend within the disk) way....

[James R. Ferguson]

Hi (again) Dave:

I'm not sure what it is you want to do. Perhaps this whitepaper will give you a better view of 'vgmodify':

http://h20000.www2.hp.com/bc/docs/support/SupportManual/c01920387/c01920387.pdf (BSC link updated by admin)

Regards!

...JRF...

[Patrick Wallek]

vgmodify actually works pretty well. I have used a version of it for 11.11 and had no trouble. I would just advise reading the man page carefully and make sure you have good backups.

[Dave Cast]

James,

I have a a LUN presented from an EVA 8000 - I increased the size from 200G to 250G on the EVA. I ran ioscan -fnC Disk on the OS (11.31) and it sees the new size of 250G at the disk level, but when I go to extend the VG that's on that disk - the only option I have is to extend to a different disk.

[Patrick Wallek · Accepted solution]

That's exactly where 'vgmodify' comes into play.

On my HP-UX 11.11 server I ran:

vgmodify -e 20000 vg04

To increase the maximum number of physical extents to 20,000 for VG04.