On Saturday 16 June 2018 12:31:28 Jim Lee wrote: > On 06/16/2018 08:36 AM, Richard Damon wrote: > > On 6/15/18 11:07 PM, Jim Lee wrote: > >>> [snip] > >>> > >>>> I once had a Mustek color scanner that came with a TWAIN driver. > >>>> If the room temperature was above 80 degrees F, it would scan in > >>>> color - otherwise, only black & white. I was *sure* it was a > >>>> hardware problem, but then someone released a native Linux driver > >>>> for the scanner. When I moved the scanner to my Linux box, it > >>>> worked fine regardless of temperature. > >>>> > >>>> -Jim > > > > That sounds like it would probably be classified as a software issue > > then (or possibly documentation). It could be hardware if the > > Windows SCSI card didn't support something it was expected to or > > perhaps indicated that it did, or didn't negotiate correctly. > > > > Ultimately, often the difference between a hardware error and a > > software error is what the documentation says, I have seen more than > > once a hardware document saying something like Feature A was > > intended to work this way but the hardware doesn't work right to > > implement it, so the software needs to do XYZ as a work around. So > > now, if the software doesn't do XYZ it is a software error, all due > > to a hardware design issue that was just redefined. > > It was a software issue that manifested itself as a hardware failure. > However, SCSI was such a temperamental beast to begin with that finger > pointing usually took as much time as diagnosing the problems. > My finger never gets tired of pointing at the bean counter between engineering design and the production floor. And there has been a time or 3 over the last 70 years when the finger was loaded. > -Jim
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