AIX Storage Management

− Maintaining only operating system information in the root volume group

is a good decision because operating system updates, reinstallations,

and crash recoveries can be effected without danger to user data.

− System updates or reinstallation generally only affect the root volume

group, so these regular and important processes can occur more quickly,

as only operating system or application data is included in the changes.

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Physical Partition Size

All physical volumes within a volume group must have the same physical

partition size. In some cases greater granularity may be required in

allocation of physical partitions to logical volumes, and the only way to

implement this is to place those logical volume with differing physical

partition requirements ...