Compaq StorageWorks HSG60 ACS Solution Software V8.6 for Compaq Tru64 UNIX Installation and Configuration Guide

8–2 HSG60 ACS Solution Software Version 8.6 for Compaq Tru64 UNIX Installation and Configuration Guide
Cloning Data for Backup
Use the CLONE utility to duplicate the data on any unpartitioned single-disk unit,
stripeset, mirrorset, or striped mirrorset in preparation for backup. When the cloning
operation is complete, you can back up the clones rather than the storageset or
single-disk unit, which can continue to service its I/O load. When you are cloning a
mirrorset, CLONE does not need to create a temporary mirrorset. Instead, it adds a
temporary member to the mirrorset and copies the data onto this new member.
The CLONE utility creates a temporary, two-member mirrorset for each member in a
single-disk unit or stripeset. Each temporary mirrorset contains one disk drive from the
unit you are cloning and one disk drive onto which CLONE copies the data. During the
copy operation, the unit remains online and active so that the clones contain the most
up-to-date data.
After the CLONE utility copies the data from the members to the clones, it restores the
unit to its original configuration and creates a clone unit you can backup. The CLONE
utility uses steps shown in Figure 8–1 to duplicate each member of a unit.