Re: Weird I/O errors with USB hard drive not remounting filesystem readonly

[tmhikaru@gmail.com]

On Tue, Nov 24, 2009 at 04:50:44PM -0500, tmhikaru@gmail.com wrote:
> On Tue, Nov 24, 2009 at 09:39:44PM +0100, Jan Kara wrote:
> > On Tue 24-11-09 15:13:01, Alan Stern wrote:
> > > On Tue, 24 Nov 2009, Jan Kara wrote:
> > > 
> > > >   After digging in block layer code, it's as we suspected:
> > > > In case of host error DID_ERROR (which is our case), scsi request is
> > > > retried iff it is not a FAILFAST request which is set if bio is doing
> > > > readahead... So this is explained and everything behaves as it should.
> > > > Thanks everybody involved :).
> > > 
> > > Okay, very good.  There remains the question of the disturbing error
> > > messages in the system log.  Should they be supressed for FAILFAST
> > > requests?
> >   I think it's useful they are there because ultimately, something really
> > went wrong and you should better investigate. BTW, "end_request: I/O error"
> > messages are in the log even for requests where we retried and succeeded...
> > 
> > 								Honza
> 
> While I agree it is useful information, I think that if the error messages
> are going to be printed, you should *also* print that this is a NON FATAL
> error and that it's going to be retried. It'd help diagnosing the path it's
> following through the failure code IMHO as well as not making users
> completely freak out like I did in my case. It is *not* particularly obvious
> given the message printed to syslog what is going wrong or why.
> 
> 	Just my opinion,
> 	Tim McGrath

	I should have asked since I'm here at the moment - do you need any
more information out of the buggy USB enclosure at the moment, or can I work
on trying to fix/replace it now?

Tim McGrath