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3–20 Creating Storagesets
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 done, 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 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 3–9 to duplicate each member of a unit.