Re: Controller trashes FS (what's new)

Richard B. Johnson (
Sun, 26 Jan 1997 21:41:48 -0500 (EST)

On Sun, 26 Jan 1997, Andrew E. Mileski wrote:

> > I have been having trouble with SCSI Controllers.
> > I got this Pentium System with an AHA-2940 Controller. The aic7xxx driver
> > is apparently not being maintained so no bugs were getting fixed. These
> > bugs were not killers, just little things like:
> Have you tried bitching on the mailing list?
> (subscribe by sending mail to
No patches. I think the aic7xxx driver problem is the "classic"
signed/unsigned object problem somewhere in the code. I am going to try
to find it now that I have "two" controllers.

The AHA-2940 controller, itself, will not work with SCSI devices that
do not disconnect, mixed with synchronous devices that do, on the same bus
I figured that the new controller was cheaper than a new tape-drive.

Internal to each controller is its own idea of what logical block is what.
I think that, since I did not rebuild any file-systems when switching
controllers, I encountered a boundary probem, resulting ultimately in
an attempt to read or write beyond the end of the physical media. I
don't think the resulting exception was handled properly somewhere. The
result being that Linux got trashed and subsequent writes went to other
SCSI-bus devices.

I now have brand-new Linux and DOS file-systems, made with this controller.
Well shall see...

Dick Johnson
Richard B. Johnson
Project Engineer
Analogic Corporation
Voice : (508) 977-3000 ext. 3754
Fax : (508) 532-6097
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