[Coco] Reading floppies with CRC error?

[Kandur]

First tried to pry the welds open, but I was afraid of
possibly damaging the disk inside.
Not sure if there was heat damage, it looks more like
abrasion marks on the disk.
Before the heart transplant, most of the time it 
wouldn't spin, when rotated, it wouldn't read.
After the transplant it spins and reads, the head steps 
a few times, then comes the CRC error, when it stops.
It would be nice to have a modified disk read routine,
that ignores the CRC errors, and keeps on copying,
even garbage for a while, until good data comes.

Kandur

Tuesday, August 19, 2014, 5:57:39 PM, you wrote:
> Kandur wrote:
>> Reading floppies with CRC error?
>> http://qdv.pw/coco/?p=253

>> Kandur


> Normally you do not need to replace the sleeve. All you need to do is pop the 
> heat welds, spread the folds gently, and reseal the sleeve. That, for me, has 
> been sufficient to remove the excess friction and permit the disk to spin normally.

> Once you have caused heat damage to the surface of a disk, the content will 
> probably be unusable. In your case, there likely is much more damage than just 
> damaged CRC entries on files.
> That being said, dEd can be used to correct CRC values on executable modules. 
> That command is present on NitrOS-9 distribution disks.

> Robert