HP XP Continuous Access Software - Manual (Page 42)

NOTE: The capacity of a journal volume is not included in the accounting capacity.
Table 9 Supported data and journal volumes
Support specifications Type
Journal volume Data volume
Available Custom Volume Size volume
Unavailable Available XP Cache LUN volume
Maximum capacity of volume for each emulation type Maximum volume capacity
Minimum capacity of a Custom Volume
Size volume.
NOTE: A journal groups consists of
areas containing journal data and an
area containing metadata for remote
copy.
Minimum capacity of a Custom
Volume Size volume. Minimum volume capacity
NOTE:
•
Specify a port in SLPR 0 when using LUN Manager to define an LU path to a data volume. It
is possible, but not recommended, that you specify a port in another SLPR when defining an
LU path. For more information about SLPR 0, see the HP StorageWorks XP Disk/Cache Partition
user guide.
•
Volumes containing a volume management area (VMA) cannot be used as journal volumes.
For more information about VMA, see the HP StorageWorks LUN Security XP Extension user
guide.
Table 10 (page 42) lists emulation types and capacities of logical volumes that can form pairs.
For more information, see Maximum number of pairs .
Table 10 Specifications for logical volumes that can form pairs
Support specification Item
Same type of pair can be created for OPEN-V Emulation type
Same capacity Volume capacity
XP Continuous Access Journal supports the LUN Expansion (LUSE) feature, which allows you to
configure a LUSE volume pvol by using 2 to 36 sequential LDEVs. If the pvol and svol of a pair
are both LUSE, the capacity and configuration of the secondary data volume must be the same as
the primary data volume. For example, when the primary data volume is a LUSE volume in which
1-GB, 2-GB, 3-GB volumes are combined in this order, the secondary data volume must be a LUSE
volume in which 1-GB, 2-GB, 3-GB volumes are combined in this order. In addition, RAID1, RAID5,
and RAID6 can coexist in the LUSE volume.
XP Continuous Access Journal also supports LUN Volume Manager on the local array, which allows
you to configure custom-size LUs that are smaller than standard-size LUs. When assigning custom-size
LUs to an XP Continuous Access Journal pair, the secondary data volume must have the same
capacity as the primary data volume.
Table 11 (page 43) lists the emulation types and capacities of the master and restore journal
volumes that can be used for XP Continuous Access Journal.
42 XP Continuous Access Journal operations requirements and restrictions