Messages in this thread | | | Date | Sat, 18 Mar 2000 16:47:39 +0100 (MEZ) | From | "Dr. Michael Weller" <> | Subject | Re: AIC-7890 SCSI problems |
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On Fri, 17 Mar 2000, G. Hugh Song wrote:
> I tried 5.1.21 and 5.1.28. Now, I use 5.1.28. Enabling the debug-mode > should not have anything to do with the SCSI timeout error. So, > this must be a bug of the aic7xxx driver.
While it should not have to do anything with it, it slows execution (changes the timing), may overcome certain compiler bugs by adding new commands and may even enable interrupts in odd places to print a message somewhere.
So, in reality, it often affects the behaviour of the system. Here, it probably means the source of your problems is a timing issue or race condition.
Michael.
BTW, I had some major problems with the aic7xxx driver on a aha2940u2w in 2.2.14. It seems the mode sense handling was pretty much screwed and caused havoc with more elaborate scsi devices (tapes, removables) that need more than plain SCSI read/write commands.
My problem (fortunately, knock on wood) seems to be cured by the 5.1.28 release. From my problems I'd claim that anyone trying to use a tape or similar device would get plenty of problems w/o it. A new 2.2 release with the updated aic7xxx driver is almost unavoidable.
Michael.
--
Michael Weller: eowmob@exp-math.uni-essen.de, eowmob@ms.exp-math.uni-essen.de, or even mat42b@spi.power.uni-essen.de. If you encounter an eowmob account on any machine in the net, it's very likely it's me.
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