On Mon, 6 Jun 2016 10:41:13 -0700 Marc MERLIN <marc@xxxxxxxxxxx> wrote: > However after the check is over, I still have 29 Current_Pending_Sector on > that drive. I had that once, even asked on this list (can't find that now), and it turned out the pending sector(s) were in the gap between the start of the partition and the start of the mdadm actual data (which turned out to be surprisingly large) -- so naturally neither a check nor repair have ever tried to read or write there. > More drive details from before I ran badblocks (not an SMR drive): > Device Model: WDC WD40EFRX-68WT0N0 > Serial Number: WD-WCC4E0642444 At least if it's out of warranty, consider checking the contact pads underside the drive PCB and cleaning them. AFAIK the WD drives in particular are known to develop rust there, which can lead to all sorts of problems including transient "pending" sectors like that. https://www.youtube.com/watch?v=qmT32VC22PU https://www.youtube.com/watch?v=tDTt_yjYYQ8 -- With respect, Roman
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