HP-UX System Administrator's Guide: Logical Volume Management HP-UX 11i v3 (B3921-90053 September 2011) Transform used: ESS version 2.2

NOTE: The vgchange command with the -a y option can be run on a volume group that
is deactivated or already activated. It attaches all paths for all disks in the volume group and
resumes automatically recovering any disks in the volume group that had been offline or any
disks in the volume group that were replaced. Therefore, run vgchange only after all work
has been completed on all disks and paths in the volume group, and it is necessary to attach
them all.
10. Initialize boot information on the disk.
For an HP Integrity server, set up the boot area and update the autoboot file in the disk's EFI
partition as described in step 5 and step 6 of “Mirroring the Boot Disk on HP Integrity Servers”
(page 92).
For an HP 9000 server, set up the boot area and update the autoboot file as described in
step 4 and step 5 of “Mirroring the Boot Disk on HP 9000 Servers” (page 90).
Replacing an Unmirrored Boot Disk
With the failure of an unmirrored boot disk, you have lost the only copy of information that is
required to boot the system. You must reinstall onto the replacement disk, or recover it from an
Ignite-UX backup.
Disk Troubleshooting and Recovery Procedures 137