none
free space on tape RRS feed

Answers

  • HI,

    There is no real absoute way to determine that.  DPM will show the amount of data sent to the tape drive in the DPM UI for each tape, but if you select the option to compress the data during backup, then the space used on the tape will be less than what is displayed.   Typical hardware compression is ~2:1 - so if your tape is 800GB native, you can figure DPM will show ~1.6TB written the tape before we fill it.  Of course the compression rate varies based on the data type. 


    Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.
    Tuesday, May 24, 2011 4:26 PM
    Moderator

All replies

  • HI,

    There is no real absoute way to determine that.  DPM will show the amount of data sent to the tape drive in the DPM UI for each tape, but if you select the option to compress the data during backup, then the space used on the tape will be less than what is displayed.   Typical hardware compression is ~2:1 - so if your tape is 800GB native, you can figure DPM will show ~1.6TB written the tape before we fill it.  Of course the compression rate varies based on the data type. 


    Regards, Mike J. [MSFT] This posting is provided "AS IS" with no warranties, and confers no rights.
    Tuesday, May 24, 2011 4:26 PM
    Moderator
  • Thanks Mike for the feedback, much appreciated.

    Si-Ming

    Wednesday, May 25, 2011 8:14 AM