How to check Ubuntu CD Image for defects

[CadCrazy]

I have downloaded Ubuntu 7.10 alternate iso image, Burned it, booted from cd & checked cd for defects. The cd is defective. Now i want to confirm whether the image i downloaded is defective or is there anything wrong with my DVD writer.

Is it possible to check UBUNTU cd image for defects ??????

 

[mehulved]

check the md5sum

 

[CadCrazy]

how ????? for cd its automatic
but for cd image is there any special command or utility ?

 

[QwertyManiac]

Find the guided solution here:
*help.ubuntu.com/community/HowToMD5SUM#head-cc4057205f46f3da4e36ee1974c50c51bd89ed24

 

[CadCrazy]

Thanks buddy i verified my cd image. Its MD5 hash matches with the one listed on website.

 

[QwertyManiac]

You should probably try burning it at a slow rate. Also verify the entire image than just checking its MD5 strings alone. Which is why I suggest torrents to be the best way to download things.

 

[CadCrazy]

Also verify the entire image

How ???????

 

[QwertyManiac]

Oh my bad, looks like that software actually compares, so yeah your ISO is fine, go ahead and burn it at 8x or something.

 

[gary4gar]

Oh my bad, looks like that software actually compares, so yeah your ISO is fine, go ahead and burn it at 8x or something.

my two years old writer messes up any disc if i burn it over 12x