v How can I balance the host adapters across the storage system to help ensure
optimum 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 new
adapters of a different type are purchased.
Maximum and minimum configurations
For storage systems that support both standard drive enclosures and High
Performance Flash Enclosures Gen2, the following table lists the minimum and
maximum host adapter features for the base frame (model 984, 985, 986, 988).
Table 58. Minimum and maximum host adapter features for the base frame
Storage
system type
Storage system
configuration
Minimum number of
host adapter features
for the base frame
Maximum number of
host adapter features
for the storage system
1
6-core or
12-core
Base frame + 2 expansion
frames
2 16
8-core Base frame 2 16
16-core or
24-core (model
985, 986)
Base frame + 1-4
expansion frames
2 32
Note:
1
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) and the
first expansion frame (model 84E, 85E, 86E).
For all-flash storage systems, the following table lists the minimum and maximum
host adapter features for the base frame (model 984, 985, 986, 988).
Table 59. Minimum and maximum host adapter features for the all-flash base frame
All-flash
storage system
type
Storage system
configuration
Minimum number of
host adapter features
for the base frame
Maximum number of
host adapter features
for the storage system
1
6-core or
12-core
Base frame 2 16
8-core Base frame 2 16
16-core or
24-core (model
985, 986)
Base frame + 1 expansion
frame
2 32
24-core (model
988)
Base frame 2 16
48-core (model
988)
Base frame + 2 expansion
frame
2 32
Chapter 4. Storage system physical configuration 107
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