[rescue] Sun 3/60 SCSI issues (Kurt M. Nowak)

Michael Thompson michael.99.thompson at gmail.com
Sun Sep 1 18:07:43 CDT 2013

> Date: Sat, 31 Aug 2013 23:48:02 -0700
> From: "Kurt M. Nowak" <kurt.m.nowak at gmail.com>
> To: Sun Rescue mail list <rescue at sunhelp.org>
> Subject: [rescue] Sun 3/60 SCSI issues
> Hi all,
> I have a Sun 3/60 and I hooked up a terminated 411 box with a Sun D-50
> to HD-50 cable and a Sun terminator. The LED on the terminator does not
> come on when I power on the machine. I did some diagnostics using the
> loopback connector mentioned in Sun3Arc.org and I get an error message
> (see the end of the test output). The other tests (b,c,s and u) all are
> ok...its the external loopback test that I have problems with. I know
> its not the cable, because it works on another machine. Someone
> mentioned that I might have a faulty fuse, but both of the two fuses on
> the board are ok (checked continuity).
> Any guidance would be greatly appreciated!
> -Kurt
> Cmd=>
> SCSI Loopback Error: all signals shld be off(high) exp 0, obs 80
> SCSI Loopback Error: Signals:ACK,BSY,SEL,ATN,REQ,MSG,C/D,I/O: exp F0, obs
> 90
> SCSI Loopback Error: Signals:ACK,BSY,SEL,ATN,REQ,MSG,C/D,I/O: exp F, obs C2
> Test failed during pass 1.  Total errors = 1.
> SCSI Interface Tests:  (Enter 'q' to return to Test Menu)

You could make sure that your SCSI cable connects the terminator power from
the D-50 to the HD-50. Some don't.

Michael Thompson

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