Path: utzoo!news-server.csri.toronto.edu!cs.utexas.edu!sdd.hp.com!hp-pcd!hpfcso!hpfcdj!kinsell
From: kinsell@hpfcdj.HP.COM (Dave Kinsell)
Newsgroups: comp.sys.hp
Subject: Re: scsi bus
Message-ID: <17330032@hpfcdj.HP.COM>
Date: 9 Mar 91 18:29:01 GMT
References: <1991Mar5.100120@siihp1.epfl.ch>
Organization: Hewlett Packard -- Fort Collins, CO
Lines: 20


>    I'am currently trying to install new disks on the SCSI bus of
>my hp 9000/400t workstation. I have already a hp660S box with 2
>disks and a dat inside. The problem is the following : it seems
>that the scsi bus ends inside the box, it is not possible to add
>other peripherals after the box on the bus. More, the two scsi
>plugs on the back are not symetricals, there is an entrance and an
>exit, you cannot interchange. But it works perfectly when i put
>the 660s box at the end on the bus. 
>

The 660S box is designed as a straight-through bus, with the external
connectors being symmetrical.  From the symptoms you describe, it sounds
like the internal SCSI bus has an open circuit near one of the connectors.
The bus is routed on a flexible PC board.  You need to work with the local
support people to see what the options are for replacement.


Regards
Dave Kinsell