IBM TotalStorage DS8000, User Manual

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I/O resources
The I/O resources that are required for a storage image consist of various
components.
For one storage image, the following hardware resources are required:
v
2 SCSI controllers with 2 disk drives each
v 2 Ethernet ports (to communicate with the HMC)
v 1 Thin Device Media Bay (for example, a CD or a DVD which can be shared
between the LPARs)
Each storage image has two physical disk drives in each processor complex. Each
disk drive contains three logical volumes, the boot volume and two logical volumes
for the memory save dump function. These three logical volumes are mirrored
across the two physical disk drives for each LPAR. For the DS8300 Model 9A2,
there are four drives in one physical processor complex.
Processor and memory allocation
In the DS8300 Model 9A2 each processor complex has four processors and up to
128 GB memory capacity. There is also a 50/50 split for processor and memory
allocation. Therefore, every LPAR has two processors and every storage image has
four processors.
The memory limit depends on the total amount of available memory in the whole
system. The following memory allocations per storage image are available:
v 32 GB (16 GB per processor complex, 16 GB per storage image)
v 64 GB (32 GB per processor complex, 32 GB per storage image)
v 128 GB (64 GB per processor complex, 64 GB per storage image)
Storage Image 1
S-HMC
Processor complex 0
Processors
2 Processors
Memory
2 Processors
Memory
I/O drawer
0
HA DA HA HA HA DA
RIO-G interface
SCSI controller
Ethernet-Port
RIO-G interface
RIO-G interface
SCSI controller
Ethernet-Port
RIO-G interface
RIO-G interface
I/O drawer
3
HA DA HA HA HA DA
CD/
DVD
Storage Image 2
boot data data boot data data
A A'
boot data data boot data data
C C'
I/O drawer
2
HA DA HA HA HA DA
I/O drawer
1
HA DA HA HA HA DA
Processor complex 0
Processors
2 Processors
Memory
2 Processors
Memory
RIO-G interface
SCSI controller
Ethernet-Port
RIO-G interface
RIO-G interface
SCSI controller
Ethernet-Port
RIO-G interface
RIO-G interface
CD/
DVD
boot data data boot data data
B B'
boot data data boot data data
D D'
F2c00154
Figure 7. Storage image resource allocation in the processor complexes of the DS8300
Chapter 7. Storage system logical partition
97