Search found 237 matches

by SomeGuy
Tue Nov 05, 2019 12:04 pm
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 52
Views: 3053

Re: Need advice on how to recover 5.25" floppy

Most "360k" floppy drives have issues reading GCR encoding. Your best bet at reading them is probably a "1.2mb" Teac drive. Of course, it is difficult to reliably write 48tpi (360k) images in a 96tpi (1.2mb) drive and KF does not support writing non-index aligned streams. But for reading and archivi...
by SomeGuy
Wed Oct 30, 2019 11:37 pm
Forum: Support
Topic: Errors Attempting To Write Stream Files
Replies: 27
Views: 498

Re: Errors Attempting To Write Stream Files

Interesting. My suspicion is that there is some electrical problem with the Mac Pro 2011, or what you were powering the drive along with it. That would explain the noise seen in the images. Not that long ago I had an issue with a failing capacitor on a video card. The entire machine worked fine, but...
by SomeGuy
Tue Oct 29, 2019 12:08 am
Forum: Support
Topic: Errors Attempting To Write Stream Files
Replies: 27
Views: 498

Re: Errors Attempting To Write Stream Files

I'm a little baffled. The posted stream is useless noise. If it were me, I'd do some additional testing between this older PC and the Kryoflux drive to ensure things are really working 100%. If this older PC can write these kinds of disk, then there is little reason why the KF would not read somethi...
by SomeGuy
Mon Oct 28, 2019 11:44 pm
Forum: Support
Topic: POLL: Problems KryoFlux under MacOS
Replies: 18
Views: 723

Re: POLL: Problems KryoFlux under MacOS

I think the main problem here is the devteam don't see us Mac users important enough or too few to fix the problem. I think the main problem here is that APPLE doesn't see Mac users as important enough. As I understand it, the problem is an OS bug that Apple refuses to fix, and the KF team would ha...
by SomeGuy
Fri Oct 25, 2019 2:15 am
Forum: Support
Topic: Old CNC system floppy copying
Replies: 18
Views: 391

Re: Old CNC system floppy copying

when I tried to look on freshly written disks by reading it with MFM sector imaging there were only errors and bad sectors shown apart from that of original disks The kryoflux decoder is pickier about accuracy than a real floppy controller. That does suggest that the quality of the original disk wa...
by SomeGuy
Thu Oct 24, 2019 9:01 pm
Forum: Support
Topic: Old CNC system floppy copying
Replies: 18
Views: 391

Re: Old CNC system floppy copying

Yes, the preservation stream dump is made up of a set of .raw files. Other applications can open those and perform additional analysis. When dumping just a preservation stream, yes, each block will be gray because no decoding occurs. That does mean you don't immediately know if there are any errors....
by SomeGuy
Thu Oct 24, 2019 12:45 pm
Forum: Support
Topic: Old CNC system floppy copying
Replies: 18
Views: 391

Re: Old CNC system floppy copying

It did not decode the first track. It could be that the first track is FM encoded instead of MFM. You could (and should) dump it as a preservation stream dump. You MIGHT be able just write the stream dump back to a floppy, but this also writes any recorded "noise" so it is not ideal. If you could po...
by SomeGuy
Sun Oct 06, 2019 6:58 pm
Forum: Support
Topic: Help Analyzing Kryoflux Stream
Replies: 9
Views: 407

Re: Help Analyzing Kryoflux Stream

In this case, the disk has a boot sector virus, which has destroyed the Bios Pramater Block that contains the geometry information needed for Winimage to open the image. (real DOS can often get along without that information) However, there are no files in the root directory and FAT seems to show no...
by SomeGuy
Sat Oct 05, 2019 10:30 pm
Forum: Software Development
Topic: RAW file reader / Maybe converter to ADF?
Replies: 4
Views: 207

Re: RAW file reader / Maybe converter to ADF?

This is why I normally start with a preservation stream dump. That first read can sometimes be the last. The stream dump can then be fed back in to the Kryoflux software and decoded. If there are errors, then I inspect/clean the disk and either retry the problematic track(s) or re-dump the entire th...
by SomeGuy
Tue Oct 01, 2019 11:55 am
Forum: Support
Topic: Any way to give statistics of a read when finnished ?
Replies: 1
Views: 133

Re: Any way to give statistics of a read when finnished ?

I've found that a huge chunk of archiving floppy disks is just the process of coaxing bits off of a disk. I always start with a preservation stream dump, and if the kryoflux software fails to decode a sector, sometimes feeding it to a third party program (such as HxC or the tools with the PCE emulat...