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slow data copies/parity rebuild

Jargo56
in General Support

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My parity rebuild is going very slowly.  I am trying to upgrade all of my 3tb drives to 6tb.  Currently I have 8 3TB drives and 4 6TB drives and I'm pre-clearing 4 more 6TB drives.  I just took out 4 3TB drives so I did a new config and the parity is going very slowly and I don't know why.  The new drives are SAS 7200RPM drives on a 6GB/sec LSI raid card flashed to IT mode.  I've attached my diagnostic file as well.  Any help is greatly appreciated.  

 

Thank you.

tower-diagnostics-20200219-1937.zip

  • Quote

    Looks like mover is doing its thing, and a preclear is going on at the same time.  Mover is probably the bulk of the problem...

  • Quote
    • Author

    When the mover stops it goes at about 35MB/sec for the parity rebuild.  Is that what I should expect?

  • Quote
    • Community Expert

    IIRC there are known performance issues with that 3ware controller.

  • Quote

    • Archived

    This topic is now archived and is closed to further replies.

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