XP10000 Disk Arrays and SVS200 (T1722-96011, January 2008)

NOTE:

The PCR capacity (MB) described in the formula is the Partial Cache Residence capacity (MB). For

more information about standard cache capacity, see Table 2.

Table 2 Capacity for data in a hard disk drive associated with a CLPR and standard cache capacity

20.3TB or

to 20.3TBto 14.4TBto 8.5TBto 2.6TBto 0.7TBCapacity

for data in

CLPR

24GB20GB16GB12GB8GB4GB

Standard

cache

capacity

NOTE:

To calculate the capacity for data in a hard disk drive associated with a CLPR, add the following

formulas:

Number of parity groups: capacity of one disk x 3 x (3D+1P)

Number of parity groups: capacity of one disk x 6 x (6D+2P)

Number of parity groups: capacity of one disk x 7 x (7D+1P)

Number of parity groups: capacity of one disk x 2 x (2D+2D)

NOTE:

To add cache memories to the local array, install them with Standard Cache Access Model or

High Performance Cache Access Model mode. If the local array has additional printed circuit

boards (PCBs), you must use the High Performance Cache Access Model mode. For more

information about additional cache memories, contact your HP account support representative.

• Restriction on CLPR and CU group

You cannot allocate parity groups belonging to different CU groups to a CLPR other than CLPR0.

For more information about CU groups, see the HP StorageWorks XP Remote Web Console user

guide for XP12000/XP10000/SVS200.

Storage management logical partitions (SLPRs)

An array can be shared with multiple organizations, for example, enterprises and departments within

an enterprise. Therefore, multiple administrators who belong to different organizations might manage

one array. This creates the potential for an administrator who belongs in one organization to destroy

other organizations' volumes. Furthermore, it can complicate and increase the difficulty of managing

the array because of an incorrect operation by an administrator and its influence on other

organizations. The storage management logical partition function in XP Disk/Cache Partition allocates

all of an array's resources (that is, ports and CLPRs) to multiple virtual arrays. Each virtual array can

be accessed by only its administrator. Therefore, this prevents the risk that an administrator will destroy

another organization's volumes or leak another organization's data.

XP Disk/Cache Partition user guide 13