errrors resyncronizing mirror with new disk

[Ivan Voras]

johnea wrote:
> Hello,
> 
> Recently a drive started to have READ_DMA failures and drop out of the gmirror.
> 
> While synching the replacement drive to the mirror, a WRITE error occured and terminated the sync.
> 
> A second attempt to sync completed but left the drive generating READ errors.
> 
> The third time the drive was inserted in the mirror the operation completed and no further errors have occured.
> 
> R'ingTFM and extensive scroogling have not yielded an explanation.
> 
> Is this expected behaviour? Should I suspect this drive? 
> (it's brand new, but the "old" one was only 9 months)

Yes. Probably either the drives or the power unit.

> Additionally smartctl on the new drive continues to indicate no errors.
> (it did indicate each of the read errors on the old drive)