On 2014.03.11 14:24, tclug at freakzilla.com wrote: > Now, I am seeing occasional checksum errors. I stress-tested the heck out of > the thing for a week or so (filled up the filesystem, then deleted most the > junk I used for that, etc) and when I ran a scrub it found 12 of them. I'm > assuming that since I am running multiple redundancies that that's not a huge > problem. Is this correct? Should I cronjob a scrub once a month? The occasional failed checksum isn't a problem when you're using ZFS with redundancy. In fact, what makes ZFS awesome is that will fix these problems on its own. If you keep getting checksum errors, there is likely problematic hardware somewhere. Considering that it's not a constant stream of a bazillion errors, it's not likely a bad controller. Perhaps the disk just has a few bad sectors. That's not a problem since ZFS will cover you. I've started doing scrubs only once a month since I have yet to see an error with these disks, but I'd recommend you do them at least once a week just to keep an eye on it since you are seeing errors. Also take note of which disks have the errors.