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Re: Need advice on how to recover 5.25" floppy

Posted: Thu Jan 31, 2019 2:18 pm
by harlus
Ok, thank you again.
Now I'll wait for my kryoflux and let's see what happens.

Re: Need advice on how to recover 5.25" floppy

Posted: Tue Feb 05, 2019 3:04 pm
by harlus
I received my kryoflux and I started to test it with some disks.
It seems it's working good, the only "strange" think it's that I often see "orange" sectors with the "additional information on header" warning, but probably it's normal.

Just one question: it's there any sequence to follow when turning off the kryoflux? In the quick start guide there is a precise sequence about the turning on sequence, but no mention about the turning off.

Re: Need advice on how to recover 5.25" floppy

Posted: Wed Feb 06, 2019 2:05 am
by SomeGuy
Yes, those orange header warnings are normal for user data disks. They are important only if you are archiving an original professionally master software disk, as that indicates a user may have written to the disk, altering the contents.

I'd expect the proper power down sequence to be the reverse of power up. Just don't disconnect the ribbon cable or any added grounding and you should be fine. (I just power my drives from my PC's power supply so it all gets turns on/shut off at the same time).

Re: Need advice on how to recover 5.25" floppy

Posted: Sun Feb 10, 2019 12:09 am
by harlus
I dumped about a half of my disks, kryoflux is working very well.
I have only a small doubt: i noticed that the generated .img images have a size of 720kb, but i use 360kb disks. Is it normal? I selected "MFM sector image" as suggested.

Re: Need advice on how to recover 5.25" floppy

Posted: Sun Feb 10, 2019 12:11 pm
by brightcaster
Looks as If you are decoding to 80 Tracks instead of 40....

David

Re: Need advice on how to recover 5.25" floppy

Posted: Mon Feb 18, 2019 10:04 am
by harlus
Another question: is it possible to know the relation beetween files and tracks?

For example, to know that "tracks 1.0 contains parts of files a.txt and b.txt", or vice-versa "file a.txt is stored in tacks 1.0 and 2.0".
It would be useful to know which files are stored in demaged sectors.

Re: Need advice on how to recover 5.25" floppy

Posted: Mon Mar 04, 2019 9:19 am
by harlus
harlus wrote:
Mon Feb 18, 2019 10:04 am
Another question: is it possible to know the relation beetween files and tracks?

For example, to know that "tracks 1.0 contains parts of files a.txt and b.txt", or vice-versa "file a.txt is stored in tacks 1.0 and 2.0".
It would be useful to know which files are stored in demaged sectors.
I found a "partial" solution for this: if you dump the same disk 2 times, and then you do an hex compare of the two resulting images (using a software like Beyond Compare or similar), the differences will be in the demaged sectors and you can have an idea about what data are demaged (obviously it's more easy if they are text files or "visually readable" files, if they are .exe or similar it's more difficult).





In the meantime i've dumped all my dos disks, and fortunately all the "important" data are safe. Obviously some disks are demaged, but i used to do backups of important disks, and it helped a lot. However i'll try another time to re-dump the demaged disks, while i'm at it.

I also found about ten commodore64 disks, and i'd like to dump also those. Which format should i use in this case? "MFM sector image" or another one?
And how can i run the software I dump? They are mainly games. For dos disks i used dosbox, is there some good emulator also for C64?