Specifications

The location code shows only the position of the SSA adapter in the using system and
the type of device that is attached. Use a service aid to find the location of the device
(disk drive module). For more information, see ″Using the Service Aids″ in
26F/80,
256/F0, and 256/F1 User’s Guide
SSA Loops and Links
The disk drive modules of the system unit are connected through two SSA links to an
SSA adapter that is located in the using system. The disk drive modules, SSA links, and
SSA adapter are configured in loops. Each loop provides a data path that starts at one
connector of the SSA adapter and passes through a link (SSA cable) to the disk drive
modules. The path continues through the disk drive modules, then returns through
another link to a second connector on the SSA adapter.
The SSA Adapter
The system unit can be attached to an SSA adapter. The adapter card has four SSA
connectors that are arranged in two pairs. Connectors A1 and A2 are one pair;
connectors B1 and B2 are the other pair.
Connector B2
Connector B1
Connector A2
Connector A1
Type-Number
Label
Green Light
Green Light
422 Service Guide