I have configured an EMC Celerra for backup using NDMP protocol in a Shared 
tape environment. Each time i start the NDMP backup the the following error is 
produced when the tape is put into the tape drive --
  rd=emc-nas:c32t0l0 (NDMP) reading:Input/Output error.
  The backup is successful and the tape drive appears to write and read 
correctly. Any ideas why this message is being produced and how can I prevent 
it.
  I have Not configured the timers on the Library properties apart for the idel 
device dismount option which is now 2 minutes.
   
  Regards.

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