HP storageworks HSG80 Reference Manual page 43

ADD SNAPSHOT_UNITS
Creates and names a snapshot unit. A snapshot unit is one that reflects the contents of
another unit at a particular point in time (the instant the ADD SNAPSHOT_UNITS
command is entered). The snapshot unit can be manually presented to the host. The
snapshot unit remains until it is deleted (DELETE command).
NOTE: This command is operational only in ACS versions 8.7S and 8.7P and only if both
controllers have mirrored cache.
Syntax
ADD SNAPSHOT_UNITS snapshot-unit storageset-name source-unit
Parameters
The following parameters are required for the ADD SNAPSHOT_UNITS command:
• snapshot-unit
• storageset-name
• source-unit
The relationship of the parameters can be summarized as follows:
When the ADD SNAPSHOT_UNITS command is entered, storageset-name
becomes snapshot-unit and archives the current contents of source-unit at that
instant.
These parameters are described in the following paragraphs:
snapshot-unit
The unit number assigned to the snapshot unit. See the ADD UNITS command for
an explanation of unit numbers.
The snapshot unit is created with all host access disabled by default. Do a SET
unit-name ENABLE command to set up host access.
The snapshot unit is created on the same controller as the source unit, and always
remain online to the same controller as the source-unit.
storageset-name
Identifies the name of the storageset that becomes the snapshot unit. The
storageset must have the following characteristics:
HSG80 Array Controller V8.7 Command Line Interface Reference Guide
ADD SNAPSHOT_UNITS
2–27