Ssa Location Code Format - IBM F80 Service Manual

SRN 48000 shows that the SSA loop contains more devices or adapters than are
allowed. The following condition exists: the loop contains more than 48 devices.
If the SRN occurred when either you or the customer switched on the using system:
1. Switch off the using system.
2. Review the configuration that you are trying to make, and determine why that
configuration is not valid.
3. Review "Rules for SSA Loops" on page 440.
4. Correct your configuration by reconfiguring the SSA cables or by removing the
excess devices or adapters from the loop.
5. Switch on the using system.
If the SRN occurred because additional devices or adapters were added to a working
SSA loop:
1. Remove the additional devices or adapters that are causing the problem, and put
the loop back into its original, working configuration.
Note: You must perform step 1 to enable the configuration code to reset itself from
2. Review "Rules for SSA Loops" on page 440.
3. Review the configuration that you are trying to make, and determine why that
configuration is not valid.
4. Correct your system to a valid configuration.

SSA Location Code Format

Location codes identify the locations of adapters and devices in the using system and
their attached subsystems and devices. These codes are displayed when the diagnostic
programs isolate a problem. For information about the location codes that are used by
the using system, see the operator guide for the using system.
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
the effects of the error.
A B - C D - E F - G H
Always 0
Always 0
Always 0
P = Physical disk drive module
L = Logical disk drive module
Adapter position (number of the slot,
1 through 8, containing the SSA adapter)
System I/0 bus identifier
Always 0
Always 0
Appendix F. SSA Software and Microcode Errors
437