Detection Scenarios
1. The loss of communications between the library and the
UDS
2. The loss of communications between the UDS controller
board and the drive brick.
Root Causes
1. Various hardware problems inside the sled.
2. Drive brick firmware bug
3. Drive sled firmware bug
4. Library communication firmware bug
5. DSIB hardware problem
6. Loss of power to sled (DSIB 48 V fuse)
Possible CRU Replacements Tape Drive
Resolution
v Update drive firmware (see “Updating Drive Firmware”
on page 7-11.
v Update library firmware (see “Updating Library
Firmware” on page 7-10.
v If the problem still exists:
– “Removing a Drive Sled” on page 11-9
– Replacing a Drive Sled
T071: Power Supply not present
Description The library can no longer detect the presence of a power
supply that was previously physically installed and
logically added to the system.
Detection Scenarios Regular polling between LCB and power supply checks for
presence of the power supply.
Root Causes
1. Power Supply has been physically removed after being
added to a powered on system.
2. Hardware failure inside supply
3. Hardware failure in library side connector of other
electronics.
Possible CRU Replacements Power Supply
Resolution Perform “DR022: Power Supply Not Present” on page
10-36.
T072: The system has reported an unmanaged fault
Description Library firmware has reported a problem that is not
associated with a specific ticket and corresponding
diagnostic resolution. This problem cannot be resolved
without escalation to tech support and engineering.
Resolution Perform “DR021: Contact Service” on page 10-36.
Chapter 10. Service Action Tickets (Txxx) and Diagnostic Resolutions (DRxxx) 10-27
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