On Wed, 2007-01-31 at 12:57 -0500, Mark Lord wrote: > Alan wrote: > >> When libata reports a MEDIUM_ERROR to us, we *know* it's non-recoverable, > >> as the drive itself has already done internal retries (libata uses the > >> "with retry" ATA opcodes for this). > > > > This depends on the firmware. Some of the "raid firmware" drives don't > > appear to do retries in firmware. > > One way to tell if this is true, is simply to time how long > the failed operation takes. If the drive truly does not do retries, > then the media error should be reported more or less instantly > (assuming drive was already spun up).
Well, the simpler way (and one we have a hope of implementing) is to examine the ASC/ASCQ codes to see if the error is genuinely unretryable. I seem to have dropped the ball on this one in that the scsi_error.c pieces of this patch http://marc.theaimsgroup.com/?l=linux-scsi&m=116485834119885 I thought I'd applied. Apparently I didn't, so I'll go back and put them in. James - To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [EMAIL PROTECTED] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
