Messages in this thread | | | Date | Tue, 18 Apr 2006 17:20:49 +0200 | From | Gunther Mayer <> | Subject | Re: ide-cd.c, "MEDIUM_ERROR" handling |
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Zinx Verituse wrote:
>I recently bought a DVD drive which appears to not retry enough when it's >having trouble reading a disc - I'm requesting an option (or changing the >default behavior) so that this drive is actually usable with the Linux >ide-cd drivers - specificly, the code: > } else if (sense_key == MEDIUM_ERROR) { > /* No point in re-trying a zillion times on a bad > * sector... If we got here the error is not correctable */ > ide_dump_status (drive, "media error (bad sector)", stat); > do_end_request = 1; > } >needs to be disabled for my drive to read CDs properly. > >With this code enabled, no retries are made, and the kernel sees medium errors >and returns bad data to the application reading; > It would be a kernel bug if it returns bad data. It should return an error code to the application.
- The device should implement a decent retry strategy. - There are special forensic applications which can be tuned to re-read bad sectors multiple times if needed. - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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