Mr Roooster <mrroos...@gmail.com> writes: [snip]
> The wd driver is retrying, (IIRC it retries 3 times) and suceeding on > the second or 3rd attempt. (See xfer 338, retry 0, followed by a 'soft > error corrected' with the same xfer number 10 seconds later. This is > the retry suceeding). > > This sits below ZFS and therefore ZFS never sees the error. If the > read failed 3 times you'd probably get a data error in ZFS. [snip] And this would very much explain why the ZFS checksum does not reflect any problems in the pool. As far as ZFS is concerned it managed to succeed in reading the disk, although with some effort. Had the sector actually been unreadable completely, I would hope that ZFS in NetBSD would have noticed and complained. With a T4 Solaris box I dealt with a whole back, I noted something simular happening and it meant that the drive was in the very early stages of failing. I did simulate a bad sector once as a test with ZFS in NetBSD to see how it might react and it worked as expected in that test, but I have not had the "opportunity" to see a real fail. -- Brad Spencer - b...@anduin.eldar.org - KC8VKS - http://anduin.eldar.org
