Figure 1 provides a high-level view of the components of a base model (Models
921, 922, 931, 932, 9A2, 9B2).
The following notes provide additional information about the labeled components
on Figure 1:
1. The rack power area of the base models provides redundant power supplies
(two primary power supplies), power control cards, and backup battery
assemblies to help protect data in the event of a loss of external power. Models
921 and 931 contain two batteries. Models 922, 932, 9A2, and 9B2 contain three
batteries to support the 4-way processors.
2. All base models allow up to eight disk enclosures, which contain the disk drives.
In a maximum configuration, each base model can hold up to 128 disk drives.
3. All base models contain one management console, a keyboard, and display. The
management console is the focal point for configuration, copy services
management, and maintenance activities.
4. All base models contain two processor enclosures. The Model 921 and 931
processor enclosures have 2-way processors. Processor enclosures on Models
922, 932, 9A2, and 9B2 have 4-way processors.
5. All base models contain I/O enclosures and adapters. The I/O enclosures hold the
adapters and provide connectivity between the adapters and the processors.
Both device adapters and host adapters are installed in the I/O enclosure.
1vxc4x
Disk Enclosures and
Disk Drive Sets
Management Console,
Keyboard and Display
Processor
Enclosures
I/O Enclosures
and Adapters
Rack Power
1
2
3
4
5
Figure 1. A base model (with front cover off) and its main components
2 DS8000 User’s Guide
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