276 Troubleshooting the Tape Library
T078
T078 - Invalid Tape Blocker Location
Description This ticket should only occur on systems with Model 1 robots (see How to
Determine Which Robot Your Library Contains on page 165).
GUI Description: A tape blocker is installed in an incorrect location
Explanation:
A tape blocker is not supported with Model 2 robots. This ticket is generated if
a tape blocker is detected to be present in a cell where it should not be. A tape
blocker is identified by a barcode label with the string “%XL” encoded on it.
Library firmware has determined the physical module configuration of the
system and determined which cells are considered to be in the bottom two
rows of storage. These cells are the only valid cells to contain a tape blocker.
If a barcode label with %XL is detected in any storage or I/E station cell other
than the bottom two rows, this RAS ticket message appears. The licensing
state or partition assignment state of a cell does not influence whether the
ticket is posted. Note that the library only detects presence of the tape blocker
in an incorrect location. It cannot confirm that tape blockers are properly
installed in the correct locations because it cannot read the %XL barcode if
the tape blocker is in the bottom two rows.
Tape blockers are not expected to be installed or detected in tape drives. The
ticket will not be posted in the case where a %XL is read in a valid tape drive
location. Also, the library robot makes no attempt to detect the tape blocker
via a physical touch test. However, if a tape blocker with an unreadable
barcode label is installed in a physically accessible storage or I/E station cell,
it may appear to be an unlabeled cartridge as determined by physical touch
tests performed by the picker.
Additional explanation about the tape blocker: The tape blocker is a device
that is used to physically obstruct the placement of an LTO tape cartridge into
a tape storage cell. It has physical features, similar to an LTO tape cartridge,
that allow it to slide into and be retained by an LTO storage magazine. A
single tape blocker blocks two storage cells in a vertical direction. It physically
slides into the lower cell similar to a cartridge and has features that protrude
upward to block the cell directly above. Due to the design of the LTO
magazines used in the library, the tape blocker can only physically seat in
certain cells within a magazine. Certain magazine cells have a structural Web
in the rear of the magazine that prevents the tape blocker from being installed
completely.
Detection Scenarios During any inventory operation, a %XL barcode label is detected in any
physically accessible storage or I/E station cell location.
Root Causes • The barcode label of a genuine tape blocker is detected in a valid cartridge
storage cell or I/E station cell.
• A tape cartridge with a barcode label of %XL is installed in a valid storage or
I/E station cell.
• A tape blocker is detected within a library that has a model 2 robot installed.
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