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From: als@bohra.cpg.oz (Anthony Shipman)
Newsgroups: comp.periphs.scsi
Subject: Re: Wangtek 5150ES SCSI behaviour
Summary: tried that
Message-ID: <562@bohra.cpg.oz>
Date: 14 Aug 90 03:11:56 GMT
References: <450@bohra.cpg.oz> <632@entec.Wichita.NCR.COM>
Organization: Computer Power Group, Melb, Australia
Lines: 38

In article <632@entec.Wichita.NCR.COM>, jlohmeye@entec.Wichita.NCR.COM (John Lohmeyer) writes:
> This sounds like an ID conflict.  Your 1542B and tape are probably both
> using the same SCSI ID.  Assuming the 1542B is at ID 7, when it polls for
> SCSI devices it starts at ID 0 and works up through the IDs.  If your tape
> is also strapped to ID 7, the 1542B will find it at ALL unoccupied IDs.
> (It could also find it at ID 0, if the Maxtor disk was not faster than the
> tape.).

I have tried the tape at different IDs. It made no difference. (I never tried
it without the Maxtor drive as somebody else suggested.)

I thought maybe this behaviour was deliberate to make the tape easier to
install for M*D*S plug and play-type customers. By having the tape respond to 
any ID that no other device responded to the customer would not have to worry 
about getting all the IDs right. This seems like a brain-damaged thing to do but
then with M*D*S who can predict?

I have sent the tape drive back and will try an Archive drive like I should
have in the first place. However since I first posted the article I have
noticed postings from people which seemed to indicate that they are
successfully using the Wangtek drive with an Adaptec controller with UNIX (I
don't know which one), which worries me further - 

    Could there be a problem with the Adaptec controller that could cause these
    symptoms?

    What is the latest firmware rev number for the AHA1542B? I read somewhere
    that the rev level must be up to date for somebody's UNIX.


And a question direct to Adaptec - 
    What is the part number/order ref for the AHA1542B Technical Reference
    manual? I want to do some register level programming of the controller.
-- 
Anthony Shipman                               ACSnet: als@bohra.cpg.oz.au
Computer Power Group
9th Flr, 616 St. Kilda Rd.,
St. Kilda, Melbourne, Australia
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