VMS 8.4 Alpha Hobbyist disk images

Antonio Carlini a.carlini at ntlworld.com
Thu Feb 1 15:51:18 CST 2018

On 01/02/18 18:10, Dave Wade via cctalk wrote:
 >> Douglas Taylor via cctech wrote:
 >> I thought I would burn these to CD and up and away. However, Windows 7
 >> balks and says, 'The selected disc image file isn't valid'.
 >> Is it Windows 7 or is there something I'm missing?  Is the CD on the
 > Try http://www.imgburn.com/
 > I think that’s what I used...
 >> Alphaserver 2048 byte block size or 512?
 > I honestly can't remember, but I don't think it matters.

I think a CD will always use 2048 byte sectors (although there are some 
modes so maybe there are other sizes near that 2048).

VAXes (and at least some Sun systems too IIRC) expected the attached CD 
drive to deliver
512 byte sectors, to match disks of the era. The CD discs themselves 
were exactly the same
as any other CD.


Antonio Carlini
arcarlini at iee.org

More information about the cctalk mailing list