Date: Wed, 3 Aug 2016 21:35:17 +0100 From: Ken Moffat <zarniwhoop@ntlworld.com> To: freebsd-questions@freebsd.org Subject: Re: Ominous smartd messages .... Message-ID: <20160803203517.GA26729@milliways.localdomain> In-Reply-To: <52094d0d-32bc-19e9-4cef-d67ed4e7aeb0@hiwaay.net> References: <e5a65f8a-27a0-65e7-42db-28bef824e0c0@hiwaay.net> <020caa94-b329-d5a6-5bd4-bfcc575c039f@freebsd.org> <10b1ff8b-c738-3cee-30bb-9812f75436c1@hiwaay.net> <20160803163937.GA21629@milliways.localdomain> <52094d0d-32bc-19e9-4cef-d67ed4e7aeb0@hiwaay.net>
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On Wed, Aug 03, 2016 at 02:25:55PM -0453, William A. Mahaffey III wrote: > On 08/03/16 11:45, Ken Moffat wrote: > > > > > I agree with Matthew, and since your custom script seemed to ignore > > all the items which I regard as relevant, after the long test has > > finished run smartctl -a on that drive and look at things like > > Reallocated Sector Count and Pending (if that is still present). > > plus any other error fields. > > > > ĸen > > > OK: > (pruning, and unwrapping) > Vendor Specific SMART Attributes with Thresholds: > ID# ATTRIBUTE_NAME FLAG VALUE WORST THRESH TYPE UPDATED > WHEN_FAILED RAW_VALUE > 5 Reallocated_Sector_Ct 0x0033 100 100 005 Pre-fail Always - 0 > 197 Current_Pending_Sector 0x0022 100 100 000 Old_age Always - 8 > 198 Offline_Uncorrectable 0x0008 100 100 000 Old_age Offline - 0 > At this point it hasn't managed to read 8 sectors, I assume it only reallocates afteri either succeding to read or giving up. I had this once on a RAID-1, I swapped the drive out as soon as it was convenient, and meanwhile the other drive in the mirror provided the data. Before that, on daily tests the position of the first failure did change once, so I think mine managed to read one of the failing sectors. A couple of years ago, 1TB spinning drives were the smallest commonly available from several retail suppliers - and not particularly reliable. I think I've had two 1TB drives (different brands) fail in the last 2 years. So, as with all drives, expect failures. ĸen -- `I shall take my mountains', said Lu-Tze. `The climate will be good for them.' -- Small Gods
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