Search found 72 matches

by Darkstar
Tue Nov 26, 2013 11:44 pm
Forum: Support
Topic: Closest thing to KryoFlux for HDDs and optical media?
Replies: 8
Views: 2262

Re: Closest thing to KryoFlux for HDDs and optical media?

Off the top of your head, do you know of any program or tool that can definitely perform that kind of raw dump of a CD? It's difficult. AFAIK there's no freely available tool that does everything. There's TruRip but I have not yet found out on how/where to get it, it seems to be a closely-guarded s...
by Darkstar
Mon Nov 25, 2013 10:23 pm
Forum: Support
Topic: Closest thing to KryoFlux for HDDs and optical media?
Replies: 8
Views: 2262

Re: Closest thing to KryoFlux for HDDs and optical media?

This is true for FDDs since from the beginning, floppy drives or controllers had some way for the OS to do a bit of "low level access" to circumvent the usual sector-based adressing. This has then be used for copy protection, under the assumption that a simple copy would only copy the "high level" d...
by Darkstar
Mon Nov 25, 2013 10:15 pm
Forum: Support
Topic: Get Information from experts about Flux transitions analysis
Replies: 38
Views: 9434

Re: Get Information from experts about Flux transitions anal

Yeah, now that I'm thinking about it some more, probably the only way to reliably detect unformatted tracks is to sample multiple revolutions and see if they match up to some degree (you need a good metric for that though... or a good filter) Still, if you get "matching" tracks you probably cannot b...
by Darkstar
Mon Nov 25, 2013 8:18 pm
Forum: Support
Topic: Closest thing to KryoFlux for HDDs and optical media?
Replies: 8
Views: 2262

Re: Closest thing to KryoFlux for HDDs and optical media?

recent HDDs can (as of today) only be dumped via dd (i.e. no raw dump). In older harddisks you can manually modify the read head and read the flux transitions, similar to KryoFlux. You can also step the heads yourself which can give you increased detail for each track (see here for a detailed report...
by Darkstar
Mon Nov 25, 2013 8:14 pm
Forum: Support
Topic: Get Information from experts about Flux transitions analysis
Replies: 38
Views: 9434

Re: Get Information from experts about Flux transitions anal

First question: Why use 5 posts instead of just putting it into one? (and yes, you can delete posts...) But I think I can answer some of your questions... Why different bands for HD and DD? Magnetic support different ??? yes, the magnetic coating (coercivity) is different [1] Why different unformat ...
by Darkstar
Thu Nov 07, 2013 8:40 pm
Forum: Support
Topic: Support for larger sector sizes/2M images
Replies: 11
Views: 1909

Re: Support for larger sector sizes/2M images

2M "cheats" by using multiple different sector sizes per track (and smaller gaps, and 82(!) tracks). It was such a fragile format that (in my experience) reading the disks on a different floppy drive worked only ~50% of the time...

Details: http://www.os2museum.com/wp/?p=1978
by Darkstar
Wed Oct 23, 2013 10:22 pm
Forum: News
Topic: Further development of writing functionality
Replies: 32
Views: 11499

Re: Further development of writing functionality

We will add signing for this, so users can actually see where an IPF is coming from (us, someone else signed, or completely unsigned). Yay, finally :D :D :D Now all we'd need is a "simple" analyzer that detects unformatted/copy protected tracks and creates the appropriate IPF track data for that (o...
by Darkstar
Sun Oct 20, 2013 11:27 pm
Forum: Support
Topic: Help me understand imaging MS-DOS floppy formats please
Replies: 3
Views: 2064

Re: Help me understand imaging MS-DOS floppy formats please

Something that I was wondering about for some time now: Is this option (-v xxx) really necessary? I mean since it is only needed for dumps to well-known formats, the decoder could always guess/infer the speed from the track data itself, or not? Similar to a PLL in software. It knows it has to expect...
by Darkstar
Sun Oct 20, 2013 11:21 pm
Forum: Support
Topic: How to create 360k image from 80track dump
Replies: 8
Views: 1351

Re: How to create 360k image from 80track dump

How about:

Usage: dtc [global options] {[image specific options] -i type} ...
Global options:
.... <list of global options>
Image specific options:
.... <list of image-related options>
by Darkstar
Sat Oct 05, 2013 11:31 am
Forum: Support
Topic: Still unsure which profile to use
Replies: 7
Views: 1199

Re: Still unsure which profile to use

How much does a license for the Analyzer cost? Is that the same as the "KryoFlux Commercial License" that was mentioned a few times before, but which I couldn't find any information for? Maybe "pricing/licensing" and "features" pages for the analyzer would be nice, because right now it looks like th...