IBM DS8700, Introduction And Planning Manual

Page: 133 / 256

Table 30. Model 951 required I/O enclosures and device adapters (based on disk
enclosures)
Storage Unit
Type Storage Unit
Configuration Disk Enclosure
Features (1241) Required Device
Adapter Features
(3053) (Note 1) Required I/O
Enclosure
Features (1301)
(Notes 2 and
3)
951 (2-way)
storage unit Business Class 1-2 1 1
3-5 2 1
951 (2-way)
storage unit Base model
(stand-alone) 1-2 1 1
3 2 1
951 (4-way)
storage unit Base model
(stand-alone) 1 1 1
2 2 2
3 3 2
4-5 4 2
Base model plus
one expansion
Model 95E 6 5 4
7 6 4
8 7 4
9-10 8 4
Notes:
1.
Each device adapter feature code represents one device adapter pair. This feature is
only supported on the first Model 95E attached to a Model 951 (feature 0351)
2. The maximum quantity is two device adapter features for each I/O enclosure feature in
the storage unit.
3. Each I/O enclosure feature represents one I/O enclosure pair.
Configuration rules for host adapters and cables
Use the following configuration rules and ordering information to help you order
host adapters and cables.
When you configure your DS8000 storage unit, consider the following issues when
ordering the host adapters for the storage unit:
v What are the minimum and maximum numbers of host adapters that I can
install?
v
How can I balance the host adapters across the storage unit to help ensure
optimum storage unit performance?
v
What host adapter configurations help ensure high availability of my data?
v How many and what type of cables do I need to order to support the host
adapters?
In addition, consider the following host adapter guidelines:
v
You can include a combination of Fibre Channel host adapters in one I/O
enclosure.
v Feature conversions are available to exchange installed adapters when
purchasing new adapters of a different type.
Chapter 4. Storage unit physical configuration
111