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well a while ago i told some one you can put cuts on a cd from the center out and it will still work so im going to see what other type of abuse you can do to them before they stop working. i will do different tests at different times and i will try to think of more tests to do. please suggest tests to me as well. if disc looks different in any way i will also post pictures. i am also testing using ubuntu 7.04 and with Sony CD-R discs
i will be filling the disc up with different types of media too so i can make sure i can read the disc. i have 106 items, totaling 657.2 MB. by the way if there is any one that thinks that these are light scratches they are not. i use an exacto knife to make them. they are deeper then any scratch i have seen on a cd with even the worst of scratches.
screen shot of a few random files i burnt to the disc
![]()
to test this i will burn several identical cd's and do different things to them.
![]()
blank disc and burnt disc pictures these will be my control
blank disc
![]()
burnt disc
![]()
First Test:
for this on i will be re testing putting cuts from the center of the disc to the out side.
4 cuts and the disc worked fine
![]()
8 cuts and the disc worked fine
![]()
and as they do in myth busters i went to the extreme with 36 cuts the disc did not work
![]()
Second Test:
this will be cuts made to follow the curve of the cd.
i got some interesting results on this test.
1 curve cut and every thing was fine
![]()
4 curve cuts and everything was still fine i could read all the data
![]()
now this is where it started to get strange i added a few more curved cuts and some of the videos became unreadable. the music files and pictures and word documents seemed to be fine
![]()
now i went overboard with this on and got some more interesting resultes. the disc was still readable. with the randomness of the cuts when they are curved it still leaves uncorrupted data. all videos were ruined. and most of the songs were too. a few pictures were ruined but all the word documents were fine.
![]()
now i have a theory why i got the results i did between curved and straight cuts. the curve cuts left room for the disc to be read so not all the data was ruined where with the straight cuts the almost all the data was hit so the disc could not be read. but it is only the smaller files that can be read because they are the only ones that fit in the space not cut.
Third Test:
will be keeping a cd in the freezer.
well the extreme cold did nothing to the cd. it still reads fine.
Fourth Test:
will be using a heat gun to show the effects of extreme heat.
well i have some good news for you all. heat does not seem to affect cd's i used a heat gun on a cd and it got the disc hot enough to where one small square of the top cover where the data is started to peal up but it did not affect the overall experiment. so what i can see is that only prolonged heat exposure will effect the cd.
part two of forth test:
left in direct sunlight.
Fifth Test:
submerged in water.
Sixth Test:
color disc from outside in to see where it stops reading.
i will be filling the disc up with different types of media too so i can make sure i can read the disc. i have 106 items, totaling 657.2 MB. by the way if there is any one that thinks that these are light scratches they are not. i use an exacto knife to make them. they are deeper then any scratch i have seen on a cd with even the worst of scratches.
screen shot of a few random files i burnt to the disc
to test this i will burn several identical cd's and do different things to them.
blank disc and burnt disc pictures these will be my control
blank disc
burnt disc
First Test:
for this on i will be re testing putting cuts from the center of the disc to the out side.
4 cuts and the disc worked fine
8 cuts and the disc worked fine
and as they do in myth busters i went to the extreme with 36 cuts the disc did not work
Second Test:
this will be cuts made to follow the curve of the cd.
i got some interesting results on this test.
1 curve cut and every thing was fine
4 curve cuts and everything was still fine i could read all the data
now this is where it started to get strange i added a few more curved cuts and some of the videos became unreadable. the music files and pictures and word documents seemed to be fine
now i went overboard with this on and got some more interesting resultes. the disc was still readable. with the randomness of the cuts when they are curved it still leaves uncorrupted data. all videos were ruined. and most of the songs were too. a few pictures were ruined but all the word documents were fine.
now i have a theory why i got the results i did between curved and straight cuts. the curve cuts left room for the disc to be read so not all the data was ruined where with the straight cuts the almost all the data was hit so the disc could not be read. but it is only the smaller files that can be read because they are the only ones that fit in the space not cut.
Third Test:
will be keeping a cd in the freezer.
well the extreme cold did nothing to the cd. it still reads fine.
Fourth Test:
will be using a heat gun to show the effects of extreme heat.
well i have some good news for you all. heat does not seem to affect cd's i used a heat gun on a cd and it got the disc hot enough to where one small square of the top cover where the data is started to peal up but it did not affect the overall experiment. so what i can see is that only prolonged heat exposure will effect the cd.
part two of forth test:
left in direct sunlight.
Fifth Test:
submerged in water.
Sixth Test:
color disc from outside in to see where it stops reading.
