Search found 181 matches

by SomeGuy
Fri Jan 18, 2019 11:10 pm
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 10
Views: 87

Re: Need advice on how to recover 5.25" floppy

If you have just a few disks that you want recovered, you might consider finding someone locally who is already set up and has experience recovering such disks. People either here or on the Vintage Computing Forum http://www.vcfed.org/ might be able to help out. Anyway, the ideal machine to use for ...
by SomeGuy
Sun Jan 06, 2019 5:22 am
Forum: Support
Topic: Validated Amiga Disks, but "no flux reversal found"
Replies: 13
Views: 377

Re: Validated Amiga Disks, but "no flux reversal found"

That is very strange. You should be getting SOMETHING. The attached files are completely empty. You should at least be getting some noise. The log you posted shows an RPM value, so that seems to indicate the disk is spinning. Basically it sounds like the drive is going but no data is getting back to...
by SomeGuy
Thu Dec 13, 2018 3:53 pm
Forum: Support
Topic: 5.25inch floppy connector question
Replies: 2
Views: 117

Re: 5.25inch floppy connector question

As you noticed, most 5.25" floppy drives use a card edge connector while 3.5" drives use a pin header connector. Electrically, these are both the same "Shugart-style" floppy interface. To connect a 5.25" floppy drive to a Kryoflux, you need a floppy cable that has both kinds of plugs instead of just...
by SomeGuy
Sat Dec 08, 2018 12:41 am
Forum: Support
Topic: Mistach * Warning on 3.5'' IBM PC Disk
Replies: 3
Views: 272

Re: Mistach * Warning on 3.5'' IBM PC Disk

Well, if you set the kryoflux's decoding sector size to 128 bytes (might be 256 or 1024 bytes, but 128 is common) and then tell it to just MFM decode that track, it should create a file with the sector's data. Note that these sectors often have an intentionally bad CRC. Sometimes for exploring oddba...
by SomeGuy
Wed Dec 05, 2018 3:01 pm
Forum: Support
Topic: Mistach * Warning on 3.5'' IBM PC Disk
Replies: 3
Views: 272

Re: Mistach * Warning on 3.5'' IBM PC Disk

In this case you have encountered an extra mastering information track. Some disk mastering systems write an extra track on track 80 (or 40 for 48tpi disks, and remember this is counting from zero) that contain information such as a the time the disk was written, the name of the software, and the th...
by SomeGuy
Tue Nov 20, 2018 12:58 am
Forum: Support
Topic: Bad sector recovery using STREAM files?
Replies: 12
Views: 357

Re: Bad sector recovery using STREAM files?

What brightcaster said. Is that the same preservation stream image?

The good news is whatever images that is, since all sectors are there and show green (no CRC errors), you can tell HxC to export that to a 1.44mb image file.
by SomeGuy
Sun Nov 18, 2018 11:17 pm
Forum: Support
Topic: Bad sector recovery using STREAM files?
Replies: 12
Views: 357

Re: Bad sector recovery using STREAM files?

On the HxC track viewer screen, select Disk View Mode and see what it plots.
by SomeGuy
Sat Nov 17, 2018 3:20 am
Forum: Support
Topic: Successfully fixed a damaged block on an AmigaDOS disk
Replies: 1
Views: 133

Re: Successfully fixed a damaged block on an AmigaDOS disk

Keep in mind that the Kryoflux can't fix physically damaged disks. You probably got lucky and it put the data at a slightly different index offset than a genuine machine would. Also, sometimes good quality disks will increase their readability after multiple read or write passes due to scraping resi...
by SomeGuy
Fri Nov 16, 2018 7:07 pm
Forum: Support
Topic: Bad sector recovery using STREAM files?
Replies: 12
Views: 357

Re: Bad sector recovery using STREAM files?

Is there any chance you could post the stream file, or does it contain private information? The first thing is to try and find out what is wrong. First of all, as a sanity check, can you properly dump other 1.44mb disks? Do you have the density line set for high density? (Normally Logic high=low den...
by SomeGuy
Mon Nov 12, 2018 9:42 pm
Forum: Dumping
Topic: Two Questions
Replies: 5
Views: 201

Re: Two Questions

Correct, there is no real error checking with a flux preservation stream dump. But the upshot is you don't have to re-read the disk again and again if you don't know the correct sector decoding parameters (some formats are much more complex). That does mean you may have to re-dump the disk if you fi...