On Fri, Mar 29, 2013 at 02:06:39PM +0100, Harald Glatt wrote: > On that note, is btrfs doing automatic background scrubs of its own or > do I have to use crontab to schedule scrubs? If you want a full-disk scrub, you'll need to schedule it yourself with cron (I run mine once a month). However, if a problem is detected during normal operation -- e.g. you read a piece of data and it's got bad checksums -- then the FS will fix it if it can, in the same way that it would with a scrub. Hugo. > Thanks! > > On Fri, Mar 29, 2013 at 1:58 PM, Josef Bacik <jbacik@xxxxxxxxxxxx> wrote: > > On Fri, Mar 29, 2013 at 03:50:15AM -0600, Swāmi Petaramesh wrote: > >> Hi there, > >> > >> I've started "btrfs scrub start /" on one of my machines (Kernel > >> 3.8.0-15 Ubuntu AMD64), which typically "behaves well" so I wasn't > >> suspected any disk issue. > >> > >> After having ran for only 165 seconds, "scrub status" shows it pretends > >> having found and corrected 22926 CSUM errors ??!?!?!?!!??? > >> > >> This is a rather new HDD, in perfect shape (SMART all OK, never > >> reallocated a single sector, less than 200 hours total runtime...) > >> > >> WTF ?!? > >> > >> I've cancelled scrub for now, until I get further understanding of what > >> can be happening... > >> > > > > So this is probably because of the extent tree corruption you had, it's just > > cleaning things up and you should be fine once it finishes. Thanks, > > > > Josef -- === Hugo Mills: hugo@... carfax.org.uk | darksatanic.net | lug.org.uk === PGP key: 65E74AC0 from wwwkeys.eu.pgp.net or http://www.carfax.org.uk --- Eighth Army Push Bottles Up Germans -- WWII newspaper --- headline (possibly apocryphal)
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