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Date: Fri, 23 May 1997 10:05:56 -0600 (MDT)
From: Brandon Gillespie <brandon@cold.org>
To: freebsd-questions@freebsd.org
Subject: Wang DAT SCSI drive woes (fwd)
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Has anybody ever wrestled with a Wang DAT SCSI drive?  I just dropped one
in my FreeBSD box.  I have used Exabytes before, but never a Wang DAT.
This one is on SCSI ID 6, and shows up in the boot probes as:

aic0 at 0x340-0x35f irq 11 on isa
aic0 waiting for scsi devices to settle
(aic0:6:0): "WangDAT Model 2600 01.2" type 1 removable SCSI 2
st0(aic0:6:0): Sequential-Access density code 0x93, 512-byte blocks,
               write-enabled

Now.. the controller is an old Adaptec 1524, I would think it is to fault,
but it hasn't given me problems with any other SCSI devices, such as
CD-ROMS, SCSI disks and Exabyte tape drives.

I received the drive in interesting conditions.  It had been in an AT&T
3B2 (yah, ancient, whee :)  And I was told by a guy who knew the
administrator of the 3b2 that ''it didnt work'' and neither of them knew
why. When I looked at the drive I hope I found why: two of the scsi
terminators were missing, out of the three racks of pins.  At least, I
hope this is why :) 

Fixing that problem, I also pushed the scsi1/2 dip-switch to scsi2.  All
of the available dip switches are as follow (also showing the state they
were in when I found the drive) 

ID2   on    obvious
ID1   off   obvious
ID0   on    obvious
PE    off
OPT   off
SCSI2 off   SCSI1/2 switch, I switched to SCSI2
CMPR  off
BS    off

I tried to find help at Wang's web site, but it sucks.  Can anybody help? 

Or at the lease, help me decrypt what these dip-switches are for?

-Brandon Gillespie