HP StorageWorks XP24000 Disk/Cache Partition User's Guide, v01 (T5214-96004, June 2007)

Table 2 Capacity for the Da ta in a Hard Disk Drive that is Ass o ciated with a C LPR
and
the Recommended C ache C apacity
Capacity for th e Data in CLPR Recommended C a
che Capacity
Less than 720GB
4GB or more
720GB or more 8GB or more
2,900GBormore 12GB ormore
8,650GBormore 16GB ormore
14,400GB or more
20GB or more
20,160GB or more 24GB or more
128,000GB or m
ore
28GB or more
146,000GB or more
32GB or more
182,000GB or more
40GB or more
218,000GB or more
48GB or more
254,000GB or more
56GB or more
290,00 0GB or more
64GB or more
326,000GB or more 72GB or more
Note: To calculate the capacity for the data in a hard d isk drive that is associated with a CLPR, use
the
following formula.
The number of parity groups: the capacity of one diskx3x (3D+1P)
The number of parity groups: the capacity of one diskx6x (6D+2P)
The numb
er of parity groups: the capacity of
one diskx7x (7D+1P)
+)The number of parity groups: the capacity of one disk x 2 x (2D+2D)
Note: To add cache memories to the storage system, install the cache memories with the Standard
Cache Access Model mode or the High Performance Cache Access Model mode. If your storage system
has
any additional printed circuit boards (PCBs), the cache memories must be installed with the High
Performance Cache Access Model mode. For further information about additional cache memories, call
HP
technic
al
support.
• CLPR and LDKC
Parity groups having the LDEVs that belo ng to the optional LD KC can be allocated to a CLPR.
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About Disk/Cache Partition Operations