NetWorker：磁带作失败，并显示错误：读取打开错误：命令成功完成（驱动器状态为介质加载或弹出失败） 

• 标记或装载磁带卷失败，并显示以下错误消息：
  read open error: command completed successfully (drive status is MEDIA LOAD OR EJECT FAILED)
  
  
• 守护程序日志 （daemon.raw） 在标记或装载作期间显示以下警告和错误：
  

  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'.

• 使用 检查磁带机状态 mt 命令显示数据错误，指示可能的硬件或介质问题：
  
  

  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)

• 作系统日志报告与磁带设备上的介质加载或弹出故障相关的警告，例如：
  

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

正如错误所暗示的那样，硬件（磁带机）或磁带介质问题。

通过交换驱动器，验证问题是与特定磁带机还是控制路径有关。硬件供应商可以就如何处理这种情况提供更好的帮助。