Installing Ultrix 4.4 on a DECstation 5000 Model 240
robert.jarratt at ntlworld.com
Wed Nov 17 17:57:25 CST 2010
> -----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
> have to be my next line of investigation.
> > -----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
> > 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.
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