Re: ZFS checksum errors on USB attach (Was: ZFS data error without reasons)

On Wednesday 01 April 2009, Damian Gerow wrote:
> Mark Powell wrote:
> : > the problem can be solved - The weird thing is that it will give CRC
> : > errros (and permenent errors) in blocks that has not been touched (or
> : > at least I think so)
> :
> : Can you be a little clearer? Perhaps some zpool status output with the
> : steps you've taken?
>
> I've run into this problem four times in the past week or so.  I haven't
> reliably been able to reproduce it (which isn't /that/ upsetting; I don't
> much like data loss, even if I can predict it), but my current hunch is
> that it has something to do with uptime: the longer the system is up, the
> more likely the bug is to trigger.
>
> Here's what happened an hour ago:
>
> I walked over to my laptop (Lenovo X200), and plugged in a Cowon D2 to
> charge up the battery.  When I tried to do other things, I received a large
> number of input/output errors, so I knew I'd triggered the bug.  Two things
> that I tried to do:

If you unload "umass" and plug a memory stick, do you see the same behaviour 
then?

Maybe it is not directly USB related.

--HPS