IBM manual IBM TotalStorage DS8000 model overview and scalability

Both models provide the following features:

￿Two processor complexes with pSeries POWER5 1.9 GHz four-way CEC each.

￿Up to 128 DDMs for a maximum of 38.4 TB with 300 GB DDMs. This is the same as for the DS8100 Model 921.

￿Up to 256 GB of processor memory, which was referred to as cache in the ESS 800.

￿Up to 16 host adapters (HAs). Each HA provides four 2 Gbps Fibre Channel ports which can freely be configured as:

–FCP ports to open system hosts

–PPRC FCP links

–FICON ports to connect to zSeries hosts

￿A HA can also contain two ESCON ports instead of four Fibre Channel ports. You cannot mix ESCON ports with Fibre Channel ports on the same HA.

DS8300 models connect to a wide variety of host server platforms. Refer to the following Web site for an up-to-date interoperability list for the DS8300 models:

http://www-1.ibm.com/servers/storage/disk/ds8000/interop.html

Figure 6-4 DS8300 Model 922/9A2 base frame rear view with and without covers

Figure 6-4displays a DS8300 Model 922 from the rear. On the left is the rear view with closed covers. The right shows the rear view of the Model 922 with no covers. The middle view is another rear view but only with one cover off. This view shows the standard 19 inch rack mounted hardware including disk drives, processor complexes, and I/O enclosures.

DS8300 models can connect to one or two expansion frames. This provides the following configuration alternatives:

￿With an expansion frame 92E or 9AE the disk storage capacity and number of adapters can expand to:

–Up to 384 DDMs in total - as for the DS8100. This is a maximum disk capacity of 115.2 TB with 300 GB DDMs.

Chapter 6. IBM TotalStorage DS8000 model overview and scalability 107