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Extremely slow Parity rebuild (new parity drive)

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I'm getting extremely slow speeds on a parity rebuild as I put in a bigger drive. It seems to be getting progressively slower. 

 

Total size:2 TB

Elapsed time:22 hours, 18 minutes

Current position:1.88 TB (94.2 %)

Estimated speed:2.5 MB/sec

Estimated finish:12 hours, 57 minutes

Sync errors corrected:

 

I've attached my diagnostics file. Any help is much appreciated.

 

 

unraid-diagnostics-20210928-0912.zip

  • Community Expert

There are writes going on to disks 1 and 2, stop those and the speed should return to normal.

  • Author

Is there a specific way to do that, or should I just spin down the discs?

  • Community Expert

Spinning down the drives won't stop the writes, they will just spin back up, you want to stop whatever is writing to the array, or don't but the sync will take much longer.

  • Author
7 minutes ago, Wicked_Chicken said:

Is there a specific way to do that, or should I just spin down the discs?

Disregard. It appears excluding those discs from my shares helped.

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