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by Jim Parsons
Last Modified: $Date: 2006/03/06 21:48:04 $
Description: An admin wishes to initialize a disk or disk partition, thereby making it a Physical Volume that can be grouped into a logical volume.
Goal Level: User Goal.
Actors: Administrator.
Trigger:An administrator wishes to make a disk or a disk partition available to a logical volume group.
Basic Path:
Success End Conditions: The disk or disk partition is has a volume group descriptor written to the start of the disk.
Alternative Paths:
Exception Paths:If a partition table exists on the disk to be initialized, the partition table will have to be erased before setting the disk up as a physical volume. This condition must be trapped and a confirmation dialog offered to the user offering a choice of:
Failure End Conditions:
Preconditions:
Postconditions:
Sample Narrative:
Open Issues:
The commandline equivalent for this command on a disk is:
pvcreate /dev/hdb
or, for a partition:
pvcreate /dev/hdb1
The commandline incantation to remove the partition table for the exception path above is:
dd if=/dev/zero of=/dev/diskname bs=1k count=1
blockdev --rereadpt /dev/diskname