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


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