[Info-vax] InfoServer 150

[Dave Froble]

On 1/27/2019 9:12 AM, Bob Wilson wrote:
> On Sunday, January 27, 2019 at 8:32:18 AM UTC-5, Hans Vlems wrote:
>> It’s just bits, no problem there. Creating an image backup from a disk still won’t work when that file gets written to a cdrom. The output of dd or backup/physical may be used as input for cd writer programs on Windows. And if necessary the filetype iso should be appended to the filename.
>
> I agree (re: "it's just bits")...a "ISO image" is just a sector-by-sector copy of physical media, which may or may not be a ISO-9660 volume. Sort of like a spiral-read of the volume from block 0 -> maxblock.
>
> I make documentation discs (CDs and DVDs) on my Mac, which I burn to ISO-9660 volumes...I can take those ISO-9660 discs and MOUNT/FOREIGN -> COPY ddcu: FOO.ISO them on a VMS system. If I do LD CONNECT of FOO.ISO and MOUNT the LDAn: device VMS recognizes it as a ISO-9660 volume (ODS-3 or -4, don't remember which).
>
> Some disc burning software insists that the file type be .ISO to convince it to do a disk-image-to-disc (we used to use .IMG as the file type, but switched to .ISO to save a step to RENAME the file).
>
> On Windows 7 right clicking  on a .ISO file gives the option to "Burn disc image", which doesn't work with non-ISO-9660 .ISO files...for a VMS/ODS .ISO file it throws a "The selected disk image isn't valid" error. Anecdotally I'd say it's trying to verify that the .ISO file contains a ISO-9660 volume (to verify I downloaded  a Ubuntu .ISO distribution to my Windows 7 system and was able to right-click & "Burn disc image" successfully).
>

Don't ya just hate things that think they know better than you?

If I tell the utility to take the specified raw data (just bits) and 
write it to a selected device, it has no business deciding whether I'm 
allowed to do so.

But, maybe that's just me.

-- 
David Froble                       Tel: 724-529-0450
Dave Froble Enterprises, Inc.      E-Mail: davef at tsoft-inc.com
DFE Ultralights, Inc.
170 Grimplin Road
Vanderbilt, PA  15486