4891 - Accessor detected a cartridge in the accessor or gripper's path

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A tape cartridge was detected in the path of the gripper on the robotic accessor. This could be caused by mis-alignment of the robotic accessor while trying to pick/place a cartridge, damaged components to the robotic accessor, or mis-plugged cables on the robotic accessor. This error is often accompanied by other errors. This fix procedure describes how to diagnose and fix the problem, and if needed, remove a stuck cartridge from a gripper.

Fix procedure

  1. Put the library in service mode:
    1. From the management GUI., go to Actions > Change Library State.
    2. Choose In Service Mode (Offline) option and then click the Set button.
  2. Open the front door.
  3. Clear away any obstacles in the way of the robotic accessor such as a cartridge sticking out of a cell. If a cartridge is sticking out of a cell push it back in.
    Additional Troubleshooting:
    1. If a cartridge is stuck between the gripper and a library slot, follow the Removing a stuck cartridge from gripper procedure.
    2. Inspect that there are no robotic accessor obstacles such as a cartridge sticking out of a cell. Other possible causes include debris in the Y-rail gear rack such as a piece of plastic, or other debris which would interfere with accessor motion.
    3. Manually move the grippers pickers and confirm no part is damaged and it moves freely. This can be done by moving the motor pulley with your fingers. Pay attention to the gripper fingers to ensure they are not damaged.
    4. Manually move the gripper assembly to left and right the entire X path by pulling on the X belt and confirm it moves freely.
    5. Manually move the robotic accessor up and down the entire library and confirm if moves freely.
    6. Check the Y axis cable connectors are well seated at both ends and confirm the cable is not damaged. If it is found damaged, replace it.
    7. Close the door and set the library online:
      1. From the management GUI., go to Actions > Change Library State.
      2. Choose Online option and then click the Set button.
    8. If the problem has been resolved, you are finished, otherwise continue with the next step.
    9. Put the library back in service mode (See Step 1)
  4. Replace the robotic accessor:
    1. Replace the robotic accessor using the Robotic Accessor videos.
    2. Reset the LCC. From the management GUI, go to Library > Nodes Cards. Right click on the LCC node card and choose Reset This process will log you out of the GUI..
    3. Close the front door and calibrate the library. From the management GUI, go to Actions > Calibrate Library and click Yes.
    4. Put the library online. From the management GUI., go to Actions > Change Library State and choose Online option.
    5. Run Library Verify. From the management GUI, go to Actions > Library Verify keep the default options and click Next
  5. If the problem was solved you are done. Otherwise, contact IBM support.
Attention: If the problem has occurred multiple times and still not resolved, contact IBM support.

Damaged Components
During the procedure, if any part is found physically damaged, replace the applicable Customer Replacement Unit (CRU). See Customer service procedures.