Hewlett Packard Enterprise HPE XP7, User Manual, Page: 62 / 311

Item Requirement
Consistency group ID Value: 0 to 2,047
With BC, BC MF, and FS, you can create up to 2,048 consistency
groups in a storage system.
Manual assignment of a consistency group ID to an FS pair using
the
paircreate
command:
Specify a consistency group ID from 0 to 255.
Automatic assignment of a consistency group ID to an FS pair using
the
paircreate
or
raidcom add snapshot
commands:
• Using the
paircreate
command, if a number is not specified,
an unassigned number from 0 to 255 is automatically assigned.
1
• Using the
raidcom add snapshot
command, if a number is
not specified, an unassigned number from 0 to 2,047 is
automatically assigned.
2
Consistency group ID is displayed in the following windows in RWC:
• Consistency Groups tab in Local Replication window.
• Consistency Group Properties window.
• In RAID Manager, use the
raidcom get snapshot
command
to view the consistency group ID.
Pair limit 8,192 pairs per consistency group.
Pair type
BC, BC MF, and Fast Snap pairs cannot be contained in a single
consistency group. For Fast Snap consistency groups, only Fast
Snap pairs can be defined in a group.
Snapshot and cloned pairs cannot be contained in a single
consistency group.
Notes:
1. Fast Snap assigns a number in ascending order from 0 to 255.
2. Business Copy uses numbers from 0 to 127. Because of this, Fast Snap assigns an unassigned
number from 128 to 2,047 first. If there is no unassigned number from 128 to 2,047, then Fast Snap
assigns an unassigned number from 0 to 127.
For microcode versions earlier than 80-05-0X-XX/XX, Fast Snap assigns a number from 0 to 2,047.
Therefore, if a consistency group was created in an earlier version, a number from 0 to 127 may be used
as its consistency group ID even if there is an unassigned number from 128 to 2,047.
Consistency group restrictions:
62 Fast Snap system and planning requirements