Topics: AIX, Installation, System Admin

Alternate disk install

It is very easy to clone your rootvg to another disk, for example for testing purposes. For example: If you wish to install a piece of software, without modifying the current rootvg, you can clone a rootvg disk to a new disk; start your system from that disk and do the installation there. If it succeeds, you can keep using this new rootvg disk; If it doesn't, you can revert back to the old rootvg disk, like nothing ever happened.

First, make sure every logical volume in the rootvg has a name that consists of 11 characters or less (if not, the alt_disk_copy command will fail).

To create a copy on hdisk1, type:

alt_disk_copy -d hdisk1
If you now restart your system from hdisk1, you will notice, that the original rootvg has been renamed to old_rootvg. To delete this volume group (in case you're satisfied with the new rootvg), type:
# alt_rootvg_op -X old_rootvg
A very good article about alternate disk installs can be found on developerWorks.

If you wish to copy a mirrored rootvg to two other disks, make sure to use quotes around the target disks, e.g. if you wish to create a copy on disks hdisk4 and hdisk5, run:
# alt_disk_copy -d "hdisk4 hdisk5"

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