Changing the compression type on a tape drive and then trying to read the tapes that were used under the old compression may cause the media, when inventoried again in the tape drive, to be marked as Bad Media or Unrecognized Media.

Article:TECH33216  |  Created: 2004-01-12  |  Updated: 2005-01-19  |  Article URL http://www.symantec.com/docs/TECH33216
Article Type
Technical Solution


Environment

Issue



Changing the compression type on a tape drive and then trying to read the tapes that were used under the old compression may cause the media, when inventoried again in the tape drive, to be marked as Bad Media or Unrecognized Media.

Solution



Changing the compression type performed by a tape drive after writing to tapes with the original compression style will cause the media to be marked as Bad or Unrecognized media in the description of the tape.  This can also occur if a tape was written to by a tape drive and then inventoried by another that does not use the same compression as the first tape drive.

To correct this, do one of the following:

If the tape has data that needs to be read

  • Change the compression of the drive back to the original compression that the tape was written to and then recover the data by performing a restore.
  • If there are 2 tape drives involved, change the compression on the second drive that the tape is being inserted into so that it matches the compression of the first tape drive or place the tape back into the original drive to read the data from the tape.

If instructions are needed on how to change the compression type that the tape drive uses, place a call to the OEM support of the hardware vendor and they can guide you through this process.

If the tape is in need of being overwritten

  • Attempt to erase the tape using NTBACKUP (The native backup software in Windows 2000 server and above if installed).
  • Backup Exec may not be able to erase the tape due to not being able to read the header info.

If instructions are needed on how to use the NTBACKUP application that comes with Windows to erase a tape, view the technote in the related documents below.



Legacy ID



269447


Article URL http://www.symantec.com/docs/TECH33216


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