HP XP P9500 Storage - Manual (Page 17)

Table 1 General system requirements (continued)
Requirement Item
cache capacity by 25 percent for Cnt Ac-J. Also, 1 GB should be added for each
journal on the system.
Note: When pair status is COPY, neither cache nor shared memory can be added
to or removed from the system. When either of these tasks is to be performed, first
split any pairs in COPY, status, then resynchronize when the cache or shared
memory operation is completed.
Required for disaster recovery. Host failover software
RAID Manager consistency groups
when multiple primary and
secondary system • Up to two mirrors can be registered in one journal. One consistency group can
be registered in each mirror. If there are four systems, you must create one
journal for each system.
•
Up to 8,192 pairs. You can register the total number of pairs in the journals
within one RAID Manager consistency group. However, it is recommended that
you register only up to 4,096 pairs.
Journals •
Max. number: 256 (0 to 255) per storage system
• Recommended number per storage system: Up to 16
•
Max. number of journal volumes: 64 per journal
• Max. number of data volumes: 8,192 per journal
See “Planning journal volumes ” (page 22) for all requirements and restrictions.
System requirements 17