Opinions: root mirror recovery

[Richard Yates SPG]

Bliss, Kevin L writes:
> If you are mirrored using VM and your root drive fails you should stay up
> and running on the mirror.  VM should notify you that the disk has failed.
> You follow the directions for removing and replacing the disk.  Once the
> disk is replaced, format the drive using the prtvtoc you have saved.  Now
> there are different ways to get where you want to be (restore from tape and
> encapsulate, your preferred copy method and encapsulate, or my preference -
> remirror).  To remirror, at a convenient time (probably scheduled with
> users/management) you encapsulate the disk.  After the required reboots for
> encapsulation, drag the plexes out of the new bogus volumes (created by the
> re-encapsulation) and drop them in the corresponding original volumes.  One
> the mirrors sync you are back to normal.

Why? Why? ISTR I've replaced root disks in our SSAs by simply
replacing the disk, initialising it, & adding it as a (bootable)
mirror. Why all this prtvtoc stuff?

Richard.
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