T063: Cannot Read Or Mismatch Wwn Label - IBM System Storage TS3310 Setup And Operator Manual

Detection Scenarios
Root Causes
Possible CRU Replacements
Possible FRU Replacements
|
Resolution

T063: Cannot Read or Mismatch WWN Label

Description
1. Code determines that there is greater then one control
module based on geographic address bits.
2. Code detects five frames or greater above the control
module per the geographic address bits.
3. Code detects five frames or greater below the control
module per the geographic address bits.
4. Code detects that one or more geographic address bit
patterns do not match a valid configuration.
5. The code detects/communicates with a device (I/O
Stations, power supplies, drives, blades, fan blades) that
should not exist per the detected frame count and
frame configuration.
6. Code determined frame configuration based on frame
count and geographic address bit pattern does not
match hard stops found by Y motion tests.
1. Greater than one control module exists in a stack of
frames wired together.
2. Five frames or greater are actually above the control
module.
3. Five frames or greater are actually below the control
module.
4. Hardware failure results in one or more invalid geo bit
patterns.
5. Hardware failure results in one or more valid but
incorrect geo bit patterns when compared to frame
count (more frames detected than actual or less frames
detected than actual).
v Module-to-Module communication cable
v Module communication terminator
v Library Control Blade
v Internal Cables and Boards Kit
v Expansion module enclosure
Perform "DR010: Expansion Module Connectivity
Diagnostic" on page 11-37.
The library logic learns the library worldwide name
(WWN) of the system by reading an internal WWN bar
code label. This is done at first boot up from a "cleared to
ship" condition in order to establish the WWN. It is also
done on subsequent boot ups to verify that the persisted
information on the library compact flash file system
matches the physical library chassis. The library will report
a problem when it cannot read the WWN or if it reads a
WWN value that does not match the persisted library
configuration. A different motion related problem will be
reported if motion is preventing the proper reading of the
WWN.
Chapter 11. Service Action Tickets (Txxx) and Diagnostic Resolutions (DRxxx)
11-23