Example 2. Broken Loop (Cable Removed):
Each disk drive module normally
communicates with the adapter through one data path. Because data can pass
around the loop in either direction, however, the adapter automatically reconfigures
the loop to enable communication to continue to each disk drive if the loop becomes
broken.
In the following diagram, eight disk drive modules should be connected to connectors
A1 and A2 of the SSA adapter. However, the loop is broken because the SSA cable
has been disconnected from connector A2. Four disk drive modules are connected
to connectors B1 and B2 of the same SSA adapter.
Although the broken loop is reported as an error, all the disk drive modules can still
communicate with the using system. The eight disk drive modules can communicate
through connector A1 of the SSA adapter . The five disk drive modules can commu-
nicate through connectors B1 and B2 of the same SSA adapter (normal loop).
7-50
RS/6000 Enterprise Server Model H Series User's Guide
Summary of Contents for H SERIES RS/6000
Page 1: ...RS 6000 Enterprise Server Model H Series IBM User s Guide SA38 0546 01...
Page 14: ...xiv RS 6000 Enterprise Server Model H Series User s Guide...
Page 16: ...xvi RS 6000 Enterprise Server Model H Series User s Guide...
Page 128: ...5 16 RS 6000 Enterprise Server Model H Series User s Guide...
Page 147: ...Chapter 6 Using the Online and Standalone Diagnostics 6 19...
Page 160: ...6 32 RS 6000 Enterprise Server Model H Series User s Guide...
Page 265: ...expect 8 r or 7 r or 6 r or 4 r or 3 r delay 2 done Appendix C Modem Configurations C 21...
Page 272: ...C 28 RS 6000 Enterprise Server Model H Series User s Guide...
Page 276: ...D 4 RS 6000 Enterprise Server Model H Series User s Guide...
Page 285: ...Index X 9...
Page 286: ...X 10 RS 6000 Enterprise Server Model H Series User s Guide...
Page 289: ......