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soci
Registered: Sep 2003
Posts: 473 |
Formatting disks with faults
Is there a disk formatting tool for 1541 which is able to detect a small faulty location and then it can lay out the sectors so that the fault ends up somewhere in a gap?
I have lots of slightly faulty disks which I don't want to throw out just because there's a small fault on one of the tracks. |
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chatGPZ
Registered: Dec 2001
Posts: 11108 |
one big problem with this idea is that you dont have a reference point (index signal) so you could shift the track to a defined offset... it'd be tricky to make a formatter that does this (in reasonable time anyway) |
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ThunderBlade
Registered: Jan 2002
Posts: 75 |
What is the point of this? Keep using disks that are broken? I'm sure there are enough working disks left - especially with the ton of 1541 Ultimate's being sold, I bet many are ready to donate a few, if needed. :) |
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soci
Registered: Sep 2003
Posts: 473 |
Sure, but if I throw them away and get new ones then where's the challenge? ;)
Groepaz: The fault location can be the reference point. Using absolute positioning (e.g with an 1571) would only complicate it.
I think I'll give it a try, this sounds like a fun project ;) |
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soci
Registered: Sep 2003
Posts: 473 |
Seems to work. But still a lot to trash ;) |
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ThunderBlade
Registered: Jan 2002
Posts: 75 |
A cool challenge in any case. |
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soci
Registered: Sep 2003
Posts: 473 |
Less trash now that I've fixed up the algorithm and the weak area detection.
This is what came out of this:
21st Century Floppy Disk Formatter V0.1
Probably not perfect, but it also depends on the disks too. Sometimes only soap and water helps ;) |
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TheRyk
Registered: Mar 2009
Posts: 2062 |
And don't validate, right? ;) |
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soci
Registered: Sep 2003
Posts: 473 |
You can validate as much as you like. That's only a problem for the BAM method. |
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Zer0-X
Registered: Aug 2008
Posts: 78 |
Haven't taken a detailed look of the resulting disk layout yet, but are you locating the error at a sector gap or at the track gap where there's usually plenty of space? |
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soci
Registered: Sep 2003
Posts: 473 |
If by track gap you mean the space after the last sector before the first sector comes again, then yes it goes into that bigger gap. |
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