Re: : Again on: How to check *CDROM* correctness?

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On Sun, 6 Apr 2003 15:22:59 +0200, M. Fioretti wrote:

> I am trying, just to see what happens, with RH8 CDs:
> 
> 	dd if=/dev/cdrom of=test.iso bs=XXXX (without mounting)
> 	md5sum test.iso
> 
> bs=2048 didn't match, I'm now trying with smaller BS sizes (other
> worthwhile valus to try, anyone?)

disc1: 668991488 / 2048 = 326656
disc2: 677511168 / 2048 = 330816
disc3: 508592128 / 2048 = 248336

> I have also realized, however, that, partly due to my own fault, we
> have been mixing two quite unrelated issues here.
> 
> 1)	md5sum file.iso       grants that what you downloaded is what
> 			      was put on the official servers
> 2)      linux mediacheck      grants that what is on a CD is
> 			      installable

2) also performs a checksum check (but omits a small area where the
program has the target checksum stored -- guessed operation).

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