Library Recovery Problem Determination - IBM TS3100 Setup, Operator, And Service Manual

v Drive/Library SCSI or Loop ID:
v Host Bus Adapter (HBA) Compatibility:
v HBA LUN 0/1 Support:
v Cable Connections:
v Fibre Channel Tape Support:
v SCSI Cable Length:
v SCSI Termination:
v Backup Application Installation:
v Device Driver Installation:

Library Recovery Problem Determination

The 2U and 4U library firmware will generally retry failed operations up to three
times before posting a failure to complete the operation, or, in some situations,
proceeding with an operation that can be completed in an alternative manner. Of
course, if the operation is successful within the allotted retry count, the appropriate
retry counter is updated and recorded in the retry log and the next library
operation will commence.
For example, failure to pick or place a cartridge from or to a designated cell or
drive location after exhausting the retry count will result in a failed operation with
the appropriate error code. However, failure to detect a particular cell location by
sensing the prism fiducial located on the cell shelf because it is missing or
damaged will eventually result in the cell location being located by the gripper, bar
code reader and positional emitter pulse count after the prism detection retry
count is exhausted. If several prisms are missing or damaged or if the accessor
Ensure that the Picker Ship Lock Key on the top cover has been removed before
powering on the library.
Ensure that the SCSI ID of the Drive/Library (or SAS or Fibre Channel Loop ID)
is correct and not the same as other devices that may be on the same bus.
Ensure that the library is compatible with the HBA. For best performance, the
HBA used for this library should be SCSI-3 LVDS. Pay particular attention to
any steps describing settings of various jumpers and/or switches.
A single ID will address both drive and library since the drive is LUN 0 and the
library is LUN 1. These models require an HBA that supports LUN scanning
which must be enabled at the HBA.
Ensure that there are no bent pins on cables and that all connections are securely
fastened.
Make sure that Fibre Channel Tape Support is enabled on the HBA if you are
installing a library with a Fibre Channel drive.
Ensure that the maximum cable length is not over 25 meters (82 ft.) for a single
device on the bus or 12 meters (40 ft.) for multiple devices. Internal SCSI length
within the library accounts for 2 ft.
Verify proper termination on both ends of the SCSI bus.
Refer to the documentation included with your backup application software
instructions on how to verify proper installation.
Make sure that the proper device driver, if applicable, is installed for the library.
Note: Many backup applications use their own drivers for the library and drive.
Before installing a driver, make sure it will not be in conflict with the
software. Contact your Backup Application vendor for this information.
Chapter 7. Troubleshooting
7-7