I always try to keep the
rootvg to a minimum, after all, how do you plan to use
mksysb to save a bootable OS media for an emergency recovery?
Just 8Gb should be plenty for AIX operating system with space to spare. Make the OS disk simple.
Keep all your user personal space, and application space in a separate volume group.
I know that there are costs with having more media, but it's well worth it. You need to ask yourself 'Is £1,000 GBP / $2,000 USD etc. worth losing my server for?' and do the job well. Of course, it will then be tempting to fill the
rootvg with other stuff, just because there is space there, but you are immediately compromising yourself.
The other way to do this would be to have the disks mirrored by the hardware and provide logical disks to the operating system. That way, you get the best of both worlds, but you need to know you can tell when a disk has failed and has left you exposed.
Can you confirm:-
- how your resized?
- if the logical volume copies were synchronised or were any stale?
- if you re-created the boot loader for the OS on the new disk(s)?
- if you put the disk into the boot list?
- what you can see from SMS / firmware prompt?
Hopefully we can help you here.
Kind regards,
Robin
