Processor Complex Features - IBM DS8880 Series Introduction And Planning Manual

Configuring for highest availability
After you meet the initial minimum order requirement, you can order one host
adapter at a time. However, it is recommended that you add host adapters (of the
same type) in pairs.
For optimum performance, it is important that you aggregate the bandwidth across
all the hardware by installing host adapters evenly across all available IO
enclosures.
Notes:
v Although one multiport adapter can provide redundant pathing, keep in mind
v If a technical support representative moves existing host adapters from one slot
Ordering host adapter cables
For each host adapter, you must provide the appropriate fiber-optic cables.
Typically, to connect Fibre Channel host adapters to a server or fabric port, provide
the following cables:
v For shortwave Fibre Channel host adapters, provide a 50-micron multimode
v For longwave Fibre Channel host adapters, provide a 9-micron single mode OS1
These fiber-optic cables are available for order from IBM.
IBM Global Services Networking Services can assist with any unique cabling and
installation requirements.

Processor complex features

These features specify the number and type of core processors in the processor
complex. All base frames (model 98x) contain two processor enclosures (POWER8
servers) that contain the processors and memory that drives all functions in the
storage system.
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DS8880 Introduction and Planning Guide
Table 59. Minimum and maximum host adapter features for the all-flash base
frame (continued)
All-flash Storage system
storage system configuration
type
1
Note: For all configurations, the maximum number of host adapters for any one frame
cannot exceed 8 with 8-port 8-Gbps host adapters or 16 with 4-port 8-Gbps or 16-Gbps host
adapters. You can add host adapters only to the base frame (model 984, 985, 986, 988) and
the first expansion frame (model 85E, 86E, 88E).
that any host requires access to data through a minimum of two separate host
adapters. To maintain access to data, in the event of a host adapter failure or an
I/O enclosure failure, the host adapters must be in different I/O enclosures.
to another, you can configure the host ports on your storage system by using the
DS Storage Manager or the DS CLI.
OM3 or higher fiber-optic cable that ends in an LC connector.
or higher fiber-optic cable that ends in an LC connector.
Minimum number of Maximum number of
host adapter features host adapter features
for the base frame for the storage system
1