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Date:      Mon, 20 Mar 95 00:31 BRT
From:      Carlos Antonio Ruggiero <TOTO@ifqsc.sc.usp.br>
To:        hackers@freefall.cdrom.com
Subject:   Problems with 2940 and 950210snap
Message-ID:  <261D8B56D39F009C1D@IFQSC.SC.USP.BR>
References:  Internet: ifqsc.usp.br HepNet: uspfsc.hepnet X.25:(0724)11620020

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Hi everybody,

I'm having problems with my Adaptec 2940 and 950210 SNAP. I understand
the ahc0 is still in the development phase but maybe someone can help me.

I have a Pentium machine with 3 IDE disk driven by a Promise IDE controller.
No problems here. Recently I bought a Quantum Empire 2100 (2 G) and a 2940
controller. I am running 2.0 Release which seems to be working really
fine (congratulations to all!!). However, 2.0R doesn't have 2940 support
so I decided to try the snap version on my new Empire disk. It seems
to work all right though getting the disk correctly probed during boot phase
is kind of tricky (what i do is: 1) Boot DOS with adaptec drivers 2)
Boot FreeBSD 950210snap. The system boots from the scsi drive but the Quantum
disk is not recognized and i have to reset the machine to stop the 
error messages about the 15th device in the scsi bus ??? 3) Boot SNAP again
and voila: everything works fine). Last week, i bought an Exabyte 4200
DAT device and connected it to the scsi bus. The system boots all right
if I follow the procedure above (except that, during step 2,
the machine doesn't give me any error messages, it just hangs...).
If I try to backup something to the DAT, mainly from the scsi disk, the system
panics randomly after a few megabytes (it lasts much longer when data comes
from the IDEs disks but it also panics..) I tried current (950317) 
with no success: the system can't get past the probe phase. It hangs trying
to probe the scsi devices. My questions are:

1) Is there anybody else having similar problems? I read something in this
list about panics and about the 2940 but cant remember what :-) Are these 
problems related?

2) Is there any possibility my Exabyte tape is not behaving correctly? It
does seem to work fine in DOS but my partitions there are quite small...

3) Is there anything I can do to help debugging the 2940 driver (if you think
the problem is there)?

4) Would the panic message help to find out what the problem is?

Thanks a lot,

Toto

toto@ifqsc.sc.usp.br



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