IBM DS8000 manual Model comparison

–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 6-5shows 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.

108DS8000 Series: Concepts and Architecture