17 Nov
2010
17 Nov
'10
11:57 p.m.
-----Original Message-----
From: Rob Jarratt [mailto:robert.jarratt at ntlworld.com]
Sent: 17 November 2010 23:42
To: 'General Discussion: On-Topic and Off-Topic Posts'
Subject: RE: Installing Ultrix 4.4 on a DECstation 5000 Model 240
It is something that crossed my mind and I have not checked. I think this
will
have to be my next line of investigation.
Thanks
Rob
> -----Original Message-----
> From: cctalk-bounces at classiccmp.org
> [mailto:cctalk-bounces at classiccmp.org]
> On Behalf Of Charles Dickman
> Sent: 17 November 2010 23:15
> To: General Discussion: On-Topic and Off-Topic Posts
> Subject: Re: Installing Ultrix 4.4 on a DECstation 5000 Model 240
>
> On Wed, Nov 17, 2010 at 2:51 PM, Rob Jarratt
> <robert.jarratt at ntlworld.com>
> wrote:
> > It is failing at the stage of detecting the disks with an
> > "invalid block size" error.
> >
> > I am using a CR-506 CD-ROM drive and the disks I have are RZ56 and
RZ57.
>
> Could this be an issue with the CD-ROM not supporting 512byte blocks?
> I know that microVAXen need this to install VMS, perhaps this is true
> with Ultrix also.
>
> With some drives you have to set a jumper to force it to 512byte blocks.
>
> -chuck
I found the sector size jumper on the CD-ROM and took it off, that was
worse, it would not boot off the CD at all. So I can only conclude that the
jumper was right before and was already set to a 512-byte sector size. So I
think the conclusion is that the CD-ROM drive should be OK.
Regards
Rob