Date: Mon, 8 Dec 2014 09:09:51 -0800 From: Sean Chittenden <seanc@groupon.com> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-fs@freebsd.org Subject: Re: ZFS scrub on new disks gives cksum errors Message-ID: <CACfj5vLXnAZgkbGnw-B0GTAsj7cHh097zzig54rcAUt=7PFHoA@mail.gmail.com> In-Reply-To: <5485CB35.5010608@multiplay.co.uk> References: <20141208155230.GA574@iozz.us> <5485CB35.5010608@multiplay.co.uk>
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I had this exact problem at home on my FreeNAS host when a box is plugged in to residential power that is "not clean." If you plug this host in to a UPS it should clear things up instantly (find a sine wave UPS, not a digital stepping supply). There's something about the fluctuating power or brownouts that ZFS is well suited to detecting (and became terrifying to me because wtf happened in the past pre-ZFS??). -sc On Mon, Dec 8, 2014 at 8:00 AM, Steven Hartland <killing@multiplay.co.uk> wrote: > Bad memory, cabling? > > > On 08/12/2014 15:53, Brian N wrote: > >> Hi. >> >> I have two new 3TB disks that I'm testing prior to installing in a >> production >> server. I created a zpool mirror, dumped a bunch of data to the pool and >> ran a >> scrub. I got back numerous CKSUM errors, the same number on each drive. >> I'm >> guessing this is not a problem with my 3TB drives but a controller or some >> other hardware problem. Is this a correct assumption? >> >> The PC where I'm running this test is using a GA-E7AUM-DS2H mainboard and >> non-ecc memory. >> >> ###### >> >> root@server:~ # zpool status >> pool: tank >> state: ONLINE >> status: One or more devices has experienced an error resulting in data >> corruption. Applications may be affected. >> action: Restore the file in question if possible. Otherwise restore the >> entire pool from backup. >> see: http://illumos.org/msg/ZFS-8000-8A >> scan: scrub repaired 0 in 3h57m with 23 errors on Mon Dec 8 03:05:28 >> 2014 >> config: >> >> NAME STATE READ WRITE CKSUM >> tank ONLINE 0 0 23 >> mirror-0 ONLINE 0 0 46 >> ada1 ONLINE 0 0 46 >> ada3 ONLINE 0 0 46 >> >> errors: 2 data errors, use '-v' for a list >> >> _______________________________________________ >> freebsd-fs@freebsd.org mailing list >> http://lists.freebsd.org/mailman/listinfo/freebsd-fs >> To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" >> > > _______________________________________________ > freebsd-fs@freebsd.org mailing list > http://lists.freebsd.org/mailman/listinfo/freebsd-fs > To unsubscribe, send any mail to "freebsd-fs-unsubscribe@freebsd.org" > -- Sean Chittenden
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