On 06/07/2016 09:57 AM, Andreas Klauer wrote: > On Mon, Jun 06, 2016 at 10:41:13AM -0700, Marc MERLIN wrote: >> Howdy, I have a raid 5 where one drive reported this: >> 197 Current_Pending_Sector 0x0032 200 199 000 Old_age Always - 29 > > RAID survival depends on healthy drives. This one does not look healthy. > If the data on your RAID is important, I'd replace this drive. Getting > this count back down to zero doesn't make it any more trustworthy. That's excessively paranoid. You missed: > 5 Reallocated_Sector_Ct 0x0033 200 200 140 Pre-fail Always - 0 In other words, the totally normal accumulation of weak spots on his disk aren't being cleaned up by overwriting as expected from raid scrubbing. The vast majority of such flaws are successfully overwritten and are not a problem. When they are overwritten and the drive firmware decides to reallocate, then you can start worrying. I replace drives when *reallocations* hit double digits, as my experience says they go to hell quickly between 10 and 100. FWIW, all of my troubles with drives were consumer-grade, mostly w/ scterc support, @ > 35k hours. I'll report to the list when my first big batch of WD reds starts to die. -- To unsubscribe from this list: send the line "unsubscribe linux-raid" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
