Problem Installing Ultrix on DECstation 2100

[Peter C. Wallace]

On Sun, 14 Dec 2014, Robert Jarratt wrote:

> Date: Sun, 14 Dec 2014 00:17:52 -0000
> From: Robert Jarratt <robert.jarratt at ntlworld.com>
> Reply-To: "General Discussion: On-Topic and Off-Topic Posts"
>     <cctalk at classiccmp.org>
> To: "General Discussion: On-Topic and Off-Topic Posts" <cctalk at classiccmp.org>
> Subject: Problem Installing Ultrix on DECstation 2100
> 
> (apologies to those on the DecTec list, looking to widen the audience)
>
>
>
> I am struggling to surmount a problem installing Ultrix 4.5 from a CD-ROM
> onto a DECstation 2100 (MIPS)
>
> After choosing the type of installation (basic or advanced) it tries to
> offer the system disk selection. However, it keeps failing because it is
> detecting the CD-ROM drive and saying it has an invalid block size. I can
> hear it spin up the hard disk that I want to install on, so it should be
> finding a suitable hard disk, but it looks like it keeps choking on the
> CD-ROM drive. I can't tell if it is failing to see the hard disk properly,
> but when I tried NetBSD on the same disk, and in the same machine, it is
> fine, so the hard disk shouldn't be the problem.
>


Is it a DEC CD-ROM drive? I think the blocksize must be 512 bytes but generic 
CD-ROM drive have a 2K? block size. Somes drives have a jumper that sets the 
block size.

>
>
> Any ideas on how to resolve this?
>
>
>
> Thanks
>
>
>
> Rob
>
>
>

Peter Wallace
Mesa Electronics

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