POWER6 LPAR:
• Unmirror your rootvg and remove hdisk0 from the rootvg volume group. If there are any swap or dump devices on this disk you may need to remove them first before you can remove hdisk1 from the rootvg volume group.
• Once the disk has been removed from the rootvg, remove it from the LPAR by executing the following:
rmdev -l hdisk0 - d
• Now you execute the bosboot command and update your bootlist now that hdisk0 has been removed and is no longer part of the system:
bosboot - a - d /dev/hdisk1
bootlist -o -m normal hdisk1
VIO Server (where hdisk0 was created):
• Remove the device from the VIO server using the rmdev command
rmdev -dev < bckcnim_hdisk0 >
• Next you will need to access the AIX OS part of the VIO server by executing:
oem_setup_env
• Now you have two options: you can extend the existing logical volume or a create a new one if there is more than enough disk space left. In this example I will be using bckcnim_lv.
smitty extendlv and add additonal LP's or smitty mklv
• Exit it out of oem_setup_env by just typing exit at the OS prompt.
• Now that you are back within the restricted shell of the VIO Server, execute the following command. You can use whatever device name you wish. I used bckcnim_hdisk1 just for example purposes:
mkvdev -vdev bckcnim_lv -vadapter < vhost# > -dev bckcnim_hdisk0
POWER6 LPAR:
• Execute cfgmgr to add the new hdisk0 back to LPAR.
• Add hdisk0 back to the rootvg volume group using the extendvg or smitty extendvg.
• Mirror rootvg using the mirrorvg command or smitty mirrorvg
• Sync the mirroring process to the background and wait to complete.
• Now you must execute bosboot again and update the bootlist again:
bosboot -a
bootlist -o -m normal hdisk0 hdisk1
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