Problem Installing Ultrix on DECstation 2100

Maciej W. Rozycki macro at
Sat Dec 13 18:57:19 CST 2014

On Sun, 14 Dec 2014, Robert Jarratt wrote:

> 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.
> Any ideas on how to resolve this?

 You need to have a CD-ROM drive that supports a 512-byte sector size and 
set it in that mode -- supporting drives will have a jumper to select 
between the usual 2kB and the 512b sector size.



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