On Tue, 2013-01-08 at 10:55 +0100, Mikael Abrahamsson wrote:

On Mon, 7 Jan 2013, Ross Boylan wrote:

quoted

I see my array is reconstructing, but I can't tell which disk failed.
Is there a way to?  I tried mdadm --detail on the array, mdadm --examine

You should look into the kernel logs, "dmesg" might tell you if there 
hasn't been much other log activity lately, otherwise you have to check 
the logfiles. It will log any fail events there.

I checked the logs and didn't see anything about a drive failing, though
there were some smartd reports of changes in drive parameters like
temperature.