Fibre-channel boot considerations for IBM pSeries hosts

Before you plan to use connect a fibre-channel host, consider the following:

• You must define the rootvg for each host.

  When a volume group is varied online, a reserve is placed on all disks in the group. For rootvg, this group is not released. You cannot share a rootvg volume between hosts even when you shutdown all the hosts except one.

• You can create only one path to the rootvg volume during the installation.
• If you use the multiboot, scanning for bootable disks takes much longer with a large number of accessible storage elements in the Storage Area Network.
• Mirror the root volume group (rootvg)

  By mirroring the storage unit root volume group, the base function and reliability of the operating system for the storage unit is not affected.