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

2 Abou t Disk/Cache Partition
Operations
The storage systems can connect multiple hosts and can be shared by multiple departments in an
enterprise, a nd also shared by multiple companies. Under this circumstances, if a host issues a lot of
I/O requests, the I/O per formance of other hosts may decrease. If a subsystem's administrator of a
department or an enterprise performs an inappropriate operation, there is a possibility that data of other
departments or companies are leaked or broken. Disk/Cache Partition enables you to prevent these
risks. “Overview of HP XP Disk/Cache Partition” on page 11 describes the overview of Disk/Cache
Partition and its features.
Over view of
Disk/Cache Partition
Disk/Cach
e
Partition is the function to lo gically partition the resources in the storage system. Disk/Cache
Partition
contains the Cache Logical Partition function and the Storage M anagement Logical Partition
function
.
Cache Logical Partition enables you to partition the built-in cache memory in the storage system into
multiple virtual cache memories. Furthermore, by allocating the partitioned virtual cache to a host, the I/O
performance of other hosts can be p rotected from decreasing even if one host issues many I/O requests.
Storage M anagement Logical Partition enables you to par tition a subsystem into multiple virtual
subsystems. Because the administrator of the virtual subsystem ca nno t access the other virtual subsystem
that
he/
she
administrates, your data is protected from the risks, such as the data destroyed by other
administrators who administrate other virtual subsystem, or the data leaked.
Section “Storage Management Logical Partition (SLPR)” on page 13 describes the Cache Logical Partition
and the S
torage Management Logical Partition.
Storage Management Logical Partition (SLPR)
Storage system can be shared with the plural organizations, for example, enterprises, and departm ents
within the enterprise. Therefore, the p lu ral administrators who are belong ed in the different organizations
may manage o ne subsystem. Under this circumstances, an administrator who is belonged in an
organization is potentially destroying the volumes of other organizations. Furthermore, there is a risk of
deriving a complicated and difficult management of storage system because of an incorrect operation
by an administrator and its influence to the other organizations. The storage management logical
partition function of Disk/Cache Par tition can allocate all resourc es of one subsystem, that is, ports and
CLPRs, to the p lu ral virtual subsystem. Each virtual subsystem can be accessed by each adm inistrator
only. Therefore, the risks of which an administrator destroys the volumes of other organization, and the
data of an organization leaks can b e prevented. Figure 1 on page 14 shows an example of which one
subsystem is partitioned to two virtual subsystems. Each virtual subsystem is allocated to two enterprises
respectively. In this case, the subsystem administrator of enterprise A can manage the virtual subsystem of
enterprise A, but cannot manage one of enterprise B. By the same token, the subsystem administrator of
enterprise B can manage the virtual subsystem of enterprise B, but cannot m anag e one of enterprise A.
The virtual subsystem that is created by the storage system's partitioned referred to as the SLPR (s
torage
management l
ogical partition). Up to 32 SLPRs including SLPR0 which is provided as a default can be
created in one subsystem. See “Launching Disk/Cache Partition” on page 33 for creating SLPR.
Note : Thoughyou usuallyneedthe licensekey to usethe StorageManagementLogical Partitionfunction
of Disk/Cache Partition, you may create up to 4 SLPRs (including SLPR0) without the license key.
XP24000 Disk/Cache Partition User's Guide
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