On Wed, 2012-02-01 at 16:33 +0000, Andre Robatino wrote: > Frank Murphy <frankly3d <at> gmail.com> writes: > > > > A built-in checksum is only useful for checking for natural corruption, > > > not a > > > deliberate fake (since in that case it's easy to change the checksum to > > > the > > > correct one for the fake). Even md5 is more than enough for this purpose. > > > > > > > So it's not error proof, > > it can fail and still have a perfect disk, correct. > > Yes, there can be a bug that causes the mediacheck to fail even though the > disc > is good (this actually happened recently during development). Conversely, it > can > pass even if the disc is fake.
mediacheck failing when the disk is good is a bug. mediacheck passing when the disk is bad may or may not be a bug, due to how checksums work. It's always possible (though *very* unlikely) to get bad data that gives a good checksum. This is not a failing of MD5 but of all checksum schemes. poc -- test mailing list test@lists.fedoraproject.org To unsubscribe: https://admin.fedoraproject.org/mailman/listinfo/test
