IBM 2109 Service Guide - Page 118

Table 33 shows the offline and online tests. Attention: Offline diagnostic tests are disruptive to switch operation. Table 33. Offline and online diagnostic tests Offline tests Offline and online tests camTest centralMemoryTest crossPortTest ramTest cmemRetentionTest cmiTest portLoopbackTest portRegTest spinSilk sramRetentionTest camTest Figure 46 shows the camTest command that verifies that the SID translation required by QuickLoop and implemented using content addressable memories (CAM) is functioning correctly. Attention: This command is not performed on an operational switch. Before issuing the camTest command, disable the switch by using the switchDisable command. Disabling the switch halts all operation on the switch. switch:admin> camTest Running CAM Test passed. Figure 46. camTest command example Related error messages: DIAG-CAMINIT, DIAG-CAMSID, DIAG-XMIT. centralMemoryTest Figure 47 on page 103 shows the centralMemoryTest command, which is used to check the central memory in each ASIC as follows: v The built-in-self-repair (BISR) circuit in each ASIC chip does not report a failure to repair bad cells (bisr test). v The data cells are uniquely written into and then read correctly (data write/read test). v The data in any one ASIC can be read from any other ASIC (asic-asic test_). v Bad parity is detected and flagged in the error register and an interrupt is posted (parity error test). v Buffer number errors can be detected and flagged in the error register and an interrupt is posted (buffer number error test). v Chip number errors are detected and flagged in the error register and an interrupt is posted (chip number error test). Attention: This command cannot be performed on an operational switch. Before issuing the centralMemoryTest command, disable the switch, using the switchDisable command. 102 IBM SAN Fibre Channel Switch: 2109 Model S16 Installation and Service Guide