For optimum storage unit performance, it is important that you order host
adapters to balance them within your storage unit.
Notes:
v Although one multiport adapter can provide redundant pathing, keep in
mind that if you install only one adapter and if there is a failure or
service action affecting that adapter, a loss of access to all data through
that adapter can occur.
v If you have an IBM service representative move existing host adapters
from one slot to another, you can configure the host ports on your
storage unit using the IBM System Storage DS Storage Manager or the
IBM System Storage DS CLI. See the "DS Storage Manager configuration
for I/O Attachment" section in the IBM System Storage DS8000 Host
Systems Attachment Guide for information on configuring storage unit
host I/O ports.
Ordering host adapter cables
For each host adapter, you must also order the appropriate host adapter cables.
Typically, to connect Fibre Channel host adapters to a server or fabric port, you
order the following cables:
v For shortwave Fibre Channel host adapters, order one of the 50 micron
multimode fiber-optic cables terminated with an LC connector.
v For longwave Fibre Channel host adapters, you can order either the 9 micron
single mode that ends in an LC connector or one of the 50 micron multimode
fiber-optic cables that ends in an LC connector. Only the 9 micron cable is
supported when the adapter feature is operating at a 2, 4 or 8 Gbps transfer rate.
IBM Global Services Networking Services can provide assistance for any unique
cabling and installation requirements.
Processor memory features
These features specify the amount of memory you want for the processors on your
model.
Feature codes for processor memory
Use these feature codes when you order processor memory for your storage unit
configuration.
Table 33 provides the processor memory feature codes for the DS8000 models.
Table 33. Processor memory feature codes
Feature Code Description Models
4211 16 GB processor memory 951 business class (2-way)
4212 32 GB processor memory 941 (2-way), 951 (2-way)
4213 64 GB processor memory 941 (2-way), 951 (2-way)
4214 128 GB processor memory 941 (2-way), 951 (2-way)
4222 32 GB processor memory 941 (4-way), 951 (4-way)
4223 64 GB processor memory 941 (4-way), 951 (4-way)
4224 128 GB processor memory 941 (4-way), 951 (4-way)
Chapter 4. Storage unit physical configuration 113
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