IBM RS6000 Service Guide - Page 277

SSA Loop Configurations That Are Not Valid Note: This section is related to SRN 48000. SRN 48000 shows that the SSA loop contains more devices or adapters than are allowed. The following condition exist: 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 3-61. 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: It is important that you perform these actions, because they enable the configuration code to reset itself from the effects of the error. 2. Review "Rules for SSA Loops" on page 3-61. 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. Appendix A. SSA Problem Determination Procedures A-15