Re: Disk imaging

["Greg J. Buchner" <buchner@tcfreenet.org>]

On Mon, 21 Feb 2000 mystix@direct.ca wrote:

> In <38B0B4F7.ED03D39@intergate.bc.ca>, Wayne Stewart <waynes@intergate.bc.ca> writes:
> 
> >Disk Copy is a Mac program that copies disks, makes disk images and will turn
> >those disk images into floppies. It's free from Apple computer. The IIgs program
> >Clone will also turn those images into disks.
> 
> OK, got it. I've been working with it for a few hours now. I've noticed that it
> has choked on some copy protected stuff, and disks that were actually damaged.
> Interestingly enough though, in general most games were still intact, but more
> recent stuff, all of which are utilities and applications have had a larger
> percentage of disk failures.

One thing you should note about the current version of Disk Copy (6.x.x).
The images it creates by default aren't able to be read by Clone if I
remember correctly.  You have to pick the Disk Copy 4.2 format in the 
pop-up box when you save it.

With Disk Copy 6, the format of the images changed from just a straight
copy with a checksum to any of the three following Disk Copy 6 formats:
Read/Write: Similiar to Disk Copy 4.2 but doesn't store a checksum
            I don't think the format is the same as Disk Copy 4.2
Read Only: Truncates any unused space at the end of a disk image
Read Only Compressed: Compresses the disk image in a way that takes a long
                      time to compress, but can be read fast

All of those formats are also able to be created as Self-Mounting Images
(.smi)...they become an application that mounts the image on a Mac desktop
without the use of Disk Copy.  The Disk Copy 6 formats are also able to be
split into smaller chunks and is able to be mounted without having all the
parts re-assembled as long as they are in the same folder on the Mac.

Greg B.

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