Search found 29 matches

by harlus
Fri Nov 22, 2019 11:42 pm
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 56
Views: 3956

Re: Need advice on how to recover 5.25" floppy

brightcaster wrote:
Fri Nov 22, 2019 8:53 pm
Just a quick shot: Could be a 80 track disk reading with a 40 track drive! As there are shades of a 15 sectors per track format maybe a 1,2Mbyte DOS Disk?

David
I'm not sure if i understood your question, however this is the label on the disk:

https://i.imgur.com/Qj2yPxI.jpg
by harlus
Fri Nov 22, 2019 11:13 am
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 56
Views: 3956

Re: Need advice on how to recover 5.25" floppy

Image format is almost the same as d64! Both is basically a sector-for-sector copy of a disk... 683 sectors of 256 byte resulting in 174848 byte which is the length of a d64 file. 2880 sectors of 512 byte resulting in 1474 560 byte which is the lengt of a standard img file (1,44 MBdisk) There are n...
by harlus
Thu Nov 07, 2019 9:57 pm
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 56
Views: 3956

Re: Need advice on how to recover 5.25" floppy

it's there some way to save it in .img format?
by harlus
Thu Nov 07, 2019 7:09 pm
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 56
Views: 3956

Re: Need advice on how to recover 5.25" floppy

Yes, i also tried to extract the graphs and all the side1 tracks seem unformatted:

https://i.imgur.com/sAB8Zc9.jpg


It's all more clear now, thank for your help.
Just one last question: using -i6 output format, which is the real format of the output? It's a .img or a .d64?
by harlus
Wed Nov 06, 2019 9:05 pm
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 56
Views: 3956

Re: Need advice on how to recover 5.25" floppy

ok, i got this: https://pastebin.com/tQVyXrkx
If seems that all side1 it's not formatted, so probably it's not a "flippy" disk and it's written only on one side, right?
This is the filtered view for the side1 tracks: https://pastebin.com/D8vkvwNi
by harlus
Tue Nov 05, 2019 8:43 pm
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 56
Views: 3956

Re: Need advice on how to recover 5.25" floppy

ok, i tried to run the .bat file and then run dtc to make the image file, i got this: https://pastebin.com/XaiiSVjj It seems that it doesn't read the side1 tracks, any idea on how to solve this? (the resulting image file is similar to the one I obtained using the GUI, but tracks are ordered in a dif...
by harlus
Tue Nov 05, 2019 3:14 pm
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 56
Views: 3956

Re: Need advice on how to recover 5.25" floppy

I also made some research to find the syntax to create an image from preservation stream, i got this:

dtc -fc:\...\Stream_Files\00.0.raw -i0 -fc:\...\Disk_1.img -i6 -m1
by harlus
Tue Nov 05, 2019 3:11 pm
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 56
Views: 3956

Re: Need advice on how to recover 5.25" floppy

Script is almost good, you're just trying to overwrite files with the same name there, so better use different target name than "track". No need to delete the tracks past 83 as KF will ignore those anyway. You're right, i didn't think about overwriting :oops: . This one should be correct: https://p...
by harlus
Tue Nov 05, 2019 12:28 pm
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 56
Views: 3956

Re: Need advice on how to recover 5.25" floppy

You'd need to space the tracks from 40 to 80. track00.0.raw -> 00.0.raw track01.0.raw -> 02.0.raw track02.0.raw -> 04.0.raw track03.0.raw -> 06.0.raw track04.0.raw -> 08.0.raw ... For side 1 tracks you'd have to start from track 8 (track00.1.raw -> 08.1.raw) and you'll lose the first four tracks as...
by harlus
Tue Nov 05, 2019 10:08 am
Forum: General
Topic: Need advice on how to recover 5.25" floppy
Replies: 56
Views: 3956

Re: Need advice on how to recover 5.25" floppy

Probably these disks are just bad, they were written many years ago, i think around 1985. However, while i'm at it, i'd like to take a dump of these disks, even if there will be many demaged sectors. So, if I uderstood correctly, the procedure to do this is: 1) take a preservation stream of the disk...