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Full Discussion: LVextend problem
Operating Systems Linux Red Hat LVextend problem Post 303003496 by rbatte1 on Thursday 14th of September 2017 12:20:15 PM
Old 09-14-2017
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
 

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volreattach(8)						      System Manager's Manual						    volreattach(8)

NAME
volreattach - Reattaches disk drives that have once again become accessible SYNOPSIS
/usr/sbin/volreattach [-rb] [accessname...] /usr/sbin/volreattach -c accessname OPTIONS
The volreattach utility has the following options: Calls the volrecover utility to attempt to recover stale plexes of any volumes on the failed disk. Performs the reattach operation in the background. Checks whether a reattach is possible. No operation is performed, but the name of the disk group and disk media name at which the disk can be reattached is displayed. DESCRIPTION
The volreattach utility attempts to reattach disks using the same disk group and media names they had before detachment. This operation may be necessary if a disk has a transient failure, or if some disk drivers are unloaded or unloadable when the Logical Storage Manager is started, causing disks to enter the failed state. If the problem is fixed, the volreattach command can be used to reattach the disks without plexes being flagged as stale, as long as the reattach happens before any volumes on the disk are started. The volreattach command is called from the voldiskadm menus as part of disk recovery. The volreattach utility tries to find a disk with a disk group and disk ID matching that of the disk(s) being reattached. If the matching disk is found, the reattach operation may still fail if the original cause (or some other cause) for the disk failure still exists. EXIT CODES
A zero exit status is returned if it is possible to perform a reattach. Otherwise, non-zero is returned. SEE ALSO
volintro(8), voldiskadm(8), volrecover(8) volreattach(8)
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