The maximum number of pairs – HP StorageWorks XP Remote Web Console Software User Manual
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Table 13 Specifications of Volumes That Can Form Pairs
Support specifications
Item
Same emulation type.
Emulation type
Same capacity.
Volume capacity
Universal Replicator for Mainframe can copy data between volumes with the same emulation and
capacity (for example, 3390-3R to 3390-3R). Universal Replicator for Mainframe also supports
the Virtual LVI/LUN feature, enabling you to establish Universal Replicator for Mainframe pairs
with custom-size emulation types as well as standard-size emulation types. When custom-size
emulation types are assigned to Universal Replicator for Mainframe pairs, the secondary data
volume must have the same capacity as the primary data volume. The Universal Replicator for
Mainframe remote console software displays the emulation type of the primary data volumes and
secondary data volumes.
Universal Replicator for Mainframe supports the Virtual LVI/LUN feature, which allows you to
configure custom-size LDEVs that are smaller than standard-size LDEVs. When custom-size LDEVs
are assigned to a Universal Replicator for Mainframe pair, the secondary data volume must have
the same capacity as the primary data volume.
shows the emulation types and capacity of the master and restore journal
volumes that can be used for a Universal Replicator for Mainframe software.
Table 14 Journal Volume Specifications
Support specifications
Item
Same emulation type.
Emulation type
Does not matter whether the capacity is the same or different.
Volume capacity
shows the RAID level combination of data volume and journal volume in the
journal group that can be used for Universal Replicator for Mainframe.
Table 15 RAID Level Configuration of Universal Replicator for Mainframe
Support specifications
Item
RAID1, RAID5, and RAID6 can coexist.
RAID configuration of data
volume and journal volume
RAID1, RAID5, and RAID6 can coexist in the same journal group.
The Maximum Number of Pairs
NOTE:
The number of pairs that can be created in a storage system is limited.
Use the number of cylinders and bitmap areas to calculate the maximum number of pairs that can
be created in a storage system.
•
The number of cylinders:
The number of pairs of a primary data volume and a secondary data volume is limited by the
number of cylinders of the volumes to be paired (that is, the capacity of the volume). If VLL is
used, the number of pairs depends on the number of cylinders specified by VLL. The limit on
the number of pairs is applied to both the primary storage system and the secondary storage
system.
illustrates the number of cylinders according to each emulation
type.
Requirements and Restrictions for Universal Replicator for Mainframe
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