The SSA links must be configured as loops. The loop is connected to the internal
connectors at the SSA adapter card. These connectors
must be a valid pair (that is,
A1 and A2, or B1 and B2); otherwise, the disk drive modules on the loop are not fully
configured, and the diagnostics fail. Operations to all the disk drive modules on a
particular loop can continue if that loop breaks at any one point.
Each pair of connectors has a green light that indicates the operational status of its
related loop:
Disk Drive Module Strings
In the system unit, the disk drive modules are arranged in a string of 2 to 6 disk drive
modules. This string has its own two SSA connectors. This string is connected
through an internal SSA cable to a pair of connectors on the SSA adapter to make
an SSA loop. (The SSA cables provide the SSA links.)
Figure 3-2 shows the relationships between the SSA connectors and the disk drive
module string in a system unit.
Figure
3-2. A String of Disk Drive Modules
Status of Light
Meaning
Off
Both SSA connectors are inactive. If disk drive modules are connected to
these connectors, either those modules are failing, or their SSA links have not
been enabled.
Permanently on
Both SSA links are active (normal operating condition).
Slow Flash
Only one SSA link is active.
3-60
Service Guide
Summary of Contents for RS6000 - 7026 - H70
Page 1: ...RS 6000 7025 F50 Series IBM Service Guide SA38 0541 01...
Page 6: ...vi Service Guide...
Page 14: ...xiv Service Guide...
Page 16: ...xvi Service Guide...
Page 18: ...Rear View 1 2 Service Guide...
Page 23: ...Operator Panel Chapter 1 Reference Information 1 7...
Page 24: ...System Data Flow 1 8 Service Guide...
Page 120: ...AIX and Physical Location Code Reference Table 3 48 Service Guide...
Page 121: ...Chapter 3 Error Code to FRU Index 3 49...
Page 208: ...5 40 Service Guide...
Page 211: ...Covers Removal 1 Open the door Chapter 6 Removal and Replacement Procedures 6 3...
Page 217: ...b Remove the I O planar cover Chapter 6 Removal and Replacement Procedures 6 9...
Page 222: ...5 Close the door 6 14 Service Guide...
Page 231: ...4 Remove the screw holding the adapter Chapter 6 Removal and Replacement Procedures 6 23...
Page 240: ...4 Remove the Processor card s as described in Processor Card on page 6 35 6 32 Service Guide...
Page 247: ...Chapter 6 Removal and Replacement Procedures 6 39...
Page 251: ...Replacement Replace in reverse order Chapter 6 Removal and Replacement Procedures 6 43...
Page 255: ...Chapter 7 Parts Information Chapter 7 Parts Information 7 1...
Page 256: ...7 2 Service Guide...
Page 278: ...A 16 Service Guide...
Page 318: ...C 4 Service Guide...
Page 333: ...expect 8 r or 7 r or 6 r or 4 r or 3 r delay 2 done Appendix D Modem Configurations D 15...
Page 340: ...D 22 Service Guide...
Page 344: ...E 4 Service Guide...
Page 353: ...VPD vital product data 3 93 Index X 9...
Page 354: ...X 10 Service Guide...
Page 356: ...X 12 Service Guide...
Page 357: ......