Product manual

Introducing CDA 7
77 A1 69UP Rev00 1-1
1. Introducing CDA 7
This chapter provides an overview of the Bull CDA 7 and highlights its
performance and reliability features. This chapter also describes hardware and
software options.
• CDA 7 Overview
• Channel Configurations
• CDA 7 Options
1.1 Versions of the Product
For GCOS 7 systems, the CDA 7 subsystem is available with two disk technologies
giving two different disk capacities: 18 GB and 36 GB.
18 GB refers to the formatted disk capacity. This is equivalent to an unformatted
disk capacity of 23 GB.
36 GB refers to the formatted disk capacity. This is equivalent to an unformatted
disk capacity of 47 GB.
NOTE:
The rest of the document will refer to the18 GB and 36 GB versions.
In the GCOS 7 environment only 18 GB disks or 36 GB disks are used. In the
Open Systems environment, when the CDA 7 cabinet is shared either 18 GB disks
or 36 GB disks can be used.