I/O Resources; Processor And Memory Allocation; Storage Image Resource Allocation In The Processor Complexes Of The Ds8300 - IBM TotalStorage DS8000 User Manual

Figure 7. Storage image resource allocation in the processor complexes of the DS8300

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
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
Processor complex 0
2 Processors Processors
RIO-G interface
RIO-G interface
Memory
SCSI controller
A A'
Ethernet-Port
boot data data boot data data
C C'
Ethernet-Port
boot data data boot data data
Memory
SCSI controller
RIO-G interface
2 Processors
RIO-G interface RIO-G interface
Storage Image 2
between the LPARs)
HA HA DA HA HA DA
I/O drawer
0
HA HA DA HA HA DA
I/O drawer
1
S-HMC
HA HA DA HA HA DA
I/O drawer
3
HA HA DA HA HA DA
I/O drawer
2
Chapter 7. Storage system logical partition
Processor complex 0
Processors 2 Processors
RIO-G interface
RIO-G interface
Memory
SCSI controller
B B'
Ethernet-Port
boot data data boot data data
D D'
Ethernet-Port
boot data data boot data data
Memory
SCSI controller
RIO-G interface
2 Processors
RIO-G interface RIO-G interface
97