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108 DS8000 Series: Concepts and Architecture
– Up to 32 host adapters (HAs) with four 2 Gbps Fibre Channel ports on each HA. Each
HA can be freely configured to hold:
• FCP ports to connect to FCP-based host servers
• FCP ports for PPRC links, which in turn can be shared between PPRC and
FCP-based hosts through a SAN fabric
• FICON ports to connect to one or more zSeries servers
• Any combination within a HA
– A HA can also have two ESCON ports, but you cannot mix ESCON ports with Fibre
Channel ports on the very same HA.
With two 92E expansion frames or two 9AE expansion frames for the storage system
LPAR model the capacity expands to:
– Up to 640 DDMs in total for a maximum of 192 TB disk storage when utilizing 300 GB
DDMs. Figure 6-5 shows such a maximum configuration for Model 922 with two
expansion frames, Model 92E, or a Model 9A2 with two expansion frames Model 9AE.
This figure also shows the basic hardware components and how they are distributed
across all three frames.
Figure 6-5 DS8300 max config for Model 922/9A2 with 2 expansion frames (either 92E or 9AE)
Note the additional I/O enclosures in the first expansion frame, which is the middle frame in
Figure 6-5. Each expansion frame has twice as many DDMs as the base frame, so with 128
DDMs in the base frame and 2 x 256 DDMs in the expansion frames, a total of 640 DDMs is
possible.
6.2 Model comparison
DS8000 models vary in processor type, disk capacity, processor memory, and host adapters.
Table 6-1 on page 109 provides an overview of the different features and numbers for the
currently available DS8000 models.