NetWorker: Tape operations fails with the error: read open error: command completed successfully (drive status is MEDIA LOAD OR EJECT FAILED) 

• Labeling or mounting tape volumes fail with the error message:
  read open error: command completed successfully (drive status is MEDIA LOAD OR EJECT FAILED)
  
  
• Daemon logs (daemon.raw) display the following warnings and errors during labeling or mounting operations:
  

  NSR info media warning: <device_name> opening: MEDIA LOAD OR EJECT FAILED  
  nsrd NSR info media warning: <device_name> moving: read open error: command completed successfully (drive status is MEDIA LOAD OR EJECT FAILED)  
  nsrd NSR warning Status update: operation 'SNMD_DEVOP_DEACTIVATE', instance '356', on device '<device_name>' has completed abnormally with status 'DEV_OP_ERROR'.

• Tape drive status check using the mt command shows data errors, indicating possible hardware or media issues:
  
  

  mt -f <device_name> status  
  <device_name>:  
  Current Status: Data error (cyclic redundancy check).
  
          default blocksize = 65536  
          maximum blocksize = 524288  
          minimum blocksize = 1  
          MaximumPartitionCount = 0  
          EOTWarningZoneSize = 0  
          Error Correction Enabled  
          CompressionEnabled  
          Features:  
                  Performs SHORT erase operation  
                  Performs LONG erase operation  
                  Performs IMMEDIATE erase operation  
                  Can report maximum tape capacity  
                  Can report amount of tape remaining  
                  Support FIXED block length mode  
                  Support VARIABLE block length mode  
                  Returns errors on write if tape is write-protected  
                  Supports hardware data compression  
                  Can provide current absolute device block address  
                  Can provide current logical block address and partition  
                  Can physically load and/or unload tape  
                  Support PREVENT / ALLOW Media Removal  
                  Performs IMMEDIATE rewind operations  
                  Allows Setting FIXED LENGTH or VARIABLE block sizes  
                  Performs IMMEDIATE Load / Unload operations  
                  Allows hardware data compression to be enabled/disabled  
                  Can position tape to an absolute physical block  
                  Can position tape to a logical block (and partition)  
                  Can position tape to END of RECORDED DATA  
                  Can perform tape record positioning (backwards/forwards)  
                  Can perform tape file positioning (backwards/forwards)  
                  Can move backwards across records or filemarks or setmarks  
                  Can write FILEMARKS  
                  Performs IMMEDIATE tape mark write operations  
  operation status on <device_name> failed: Data error (cyclic redundancy check).  
  (Investigate bad media or hardware)

• Operating system logs report warnings related to media load or eject failures on the tape device, such as:
  

  NetWorker media: (warning) rd=dcp-nwsn1.rnp.local:\\.\Tape4 opening: MEDIA LOAD OR EJECT FAILED

As the error suggest, Hardware (tape drive) or tape media problem.

Verify if the problem is with a specific tape drive or control path by swapping drives. The hardware vendor can provide better assistance on how to deal with this situation.