Chapter 7. Storage system logical partition
A storage system logical partition allows the division of a single server into two
completely independent virtual storage systems.
A logical partition uses hardware and firmware to logically allocate the resources
between partitions.
The storage system logical partition function is currently supported on the DS8300
Model 9A2. It provides two virtual storage systems in one physical machine. Each
storage system logical partition can run its own level of licensed machine code.
The resource allocation for processors, memory, and I/O slots in the two storage
system LPARs on the DS8300 is divided into a fixed ratio of 50/50.
Note:
v A storage system logical partition must be associated with the same
storage system logical partition.
v Each storage system logical partition can have 255 logical subsystems
(LSSs) with LSS IDs 0–254.
DS8300 LPAR implementation
The DS8300 Model 9A2 provides a split between the resources in a 50/50 ratio.
Each storage image uses the machine type/model number/serial number of the
DS8300 Model 9A2 base frame. The frame serial number ends with a 0. The last
character of the serial number is replaced by a number in the range one to eight
that uniquely identifies the DS8000 image. This character is a 1 or a 2, because
there are only two available storage images. The serial number distinguishes
between the storage images in the GUI and CLI. The serial number is also used for
licensing and the allocation of licenses between the storage images.
The following figure illustrates the DS8300 LPAR resource allocation that is allowed.
© Copyright IBM Corp. 2004, 2005 95
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