Date: Thu, 21 Jun 2012 18:13:28 -0700 From: Dennis Glatting <freebsd@pki2.com> To: Steven Hartland <killing@multiplay.co.uk> Cc: freebsd-fs@freebsd.org, Rich <rercola@pha.jhu.edu>, rondzierwa@comcast.net Subject: Re: ZFS Checksum errors Message-ID: <1340327608.669.2.camel@btw.pki2.com> In-Reply-To: <7CD42032309D4072A0EC3B0187378658@multiplay.co.uk> References: <CAGMYy3tW3By4RLj1=q_-NN7GYS_Yv2QY64A4p0z1x8VDe5F-Hg@mail.gmail.com> <1953965235.30115.1340315339964.JavaMail.root@sz0192a.westchester.pa.mail.comcast.net> <CAOeNLupjb0Ku=KQnZaF%2B-G7GfMKj6Yux32sG8jKbBt4GMJQBxA@mail.gmail.com> <7CD42032309D4072A0EC3B0187378658@multiplay.co.uk>
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On Thu, 2012-06-21 at 23:04 +0100, Steven Hartland wrote: > It could also be issues with the hardware above the raid controller, e.g. main memory. > > Hardware raid check doesn't really tell you too much where as zfs checks are end to end so > will detect intermediate issues like memory or cpu problems. > Is SMART running? I found smartmontools useful in telling me of disk troubles, such as increasing uncorrectable errors. In each case where SMART reported this (about ten disks in the last two years), the disk was indeed failing and on replacement the problems went away. > We've even had a few issues in the past where the raid controller thought everything was > fine but zfs was complaining and it did turn out to be disks on the way out. > > So at this point I wouldn't rule out anything. > > Regards > Steve > ----- Original Message ----- > From: "Rich" <rercola@pha.jhu.edu> > To: <rondzierwa@comcast.net> > Cc: <freebsd-fs@freebsd.org> > Sent: Thursday, June 21, 2012 10:51 PM > Subject: Re: ZFS Checksum errors > > > To be honest, if ZFS says you've got a ton of checksum errors, I would > strongly bet in favor of your data being damaged over a bug in ZFS. > > What're the underlying disks and RAID card? > > > ================================================ > This e.mail is private and confidential between Multiplay (UK) Ltd. and the person or entity to whom it is addressed. In the event of misdirection, the recipient is prohibited from using, copying, printing or otherwise disseminating it or any information contained in it. > > In the event of misdirection, illegible or incomplete transmission please telephone +44 845 868 1337 > or return the E.mail to postmaster@multiplay.co.uk. > > _______________________________________________ > 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"
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