Double-point notation for mirror disks

Double-point notation is used to designate mirror disks unambiguously after they have been detached from the original unit (e.g. for performing a backup with HSMS). Mirror disks are created using the replication functions of external disk storage systems.

For this purpose the point created in a VSN with point notation is changed into a double point or, in PUB notation, the character string “PUB” is changed to “P:B”.

Examples

			Double-point notation
Point notation:	ABC.04	becomes	ABC:04
	XY.123	becomes	XY:123
PUB notation:	PUB023	becomes	P:B023
	PUBX88	becomes	P:BX88

When a mirror pubset is created with SHC-OSD, this renaming can take place implicitly. However, only SF pubsets can be renamed implicitly.