[4519] in linux-scsi channel archive
Re: What is this error?
daemon@ATHENA.MIT.EDU (Leonard N. Zubkoff)
Sun Aug 9 13:46:09 1998
Date: Sun, 9 Aug 1998 10:43:45 -0700
From: "Leonard N. Zubkoff" <lnz@dandelion.com>
To: F.Potorti@cnuce.cnr.it
CC: linux-scsi@vger.rutgers.edu
In-reply-to: <m0z5Uyg-00083EC@fly.cnuce.cnr.it> (message from Francesco
Potorti` on Sun, 9 Aug 1998 14:53:38 +0200 (CEST))
Date: Sun, 9 Aug 1998 14:53:38 +0200 (CEST)
From: Francesco Potorti` <F.Potorti@cnuce.cnr.it>
Thank you very much for your kind answer.
I wonder what happens when you are not on this list :-) Is there a free
source where I can find the meanings of these status messages? Would
it be reasonable to output a more verbose error message?
You might want to try reading the source code. The error message clearly
indicates that this is "Host Adapter Status 12", and looking in BusLogic.h we
find:
/*
Define the Host Adapter Status Codes. The MultiMaster Firmware does not
return status code 0x0C; it uses 0x12 for both overruns and underruns.
*/
.
.
.
BusLogic_DataOverRun = 0x12,
Now I could indeed add more verbose messages here, but encountering these
errors is quite rare so it's never seemed worth the trouble, and it's really
not that difficult to check the source. I'll think about this for the next
driver release.
That is what I suspected. All five devices are inside the PC box, and
are connected using two old high quality narrow SCSI cables connected in
series (I fear this is where the specifications are not met). One end
is the BusLogic card itself, and the other end is an active terminator.
One possible source of trouble is that the cable is confined inside the
PC box, so it is twisted and may interfere with itself. Another one may
be the high temperatures we are experiencing here now. Since I usually
dislike air conditioning, the box is running 24 hours a day at
temperatures which may exceed 30C, so maybe an occasional error is not
exceptional. In fact, I have run this setup without errors for some
months.
Again, thanks for your kind suggestions.
All of the possible "sources of trouble" you mention could well contribute to
this problem.
Leonard
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