Re: It's not the fall, it's the sudden stop..

OK, here goes at picking at your argument....

You trust dedupe for everything except backup, inferring your OK for live service but not for the backup copy? You trust the tape that you might go back to even though there is really limited crc protection there and not hing like sha256?

From the blog site quoted :

"When using a secure hash like SHA256, the probability of a hash collision is about 2^-256 = 10^-77 or, in more familiar notation, 0.00000000000000000000000000000000000000000000000000000000000000000000000000001.

For reference, this is 50 orders of magnitude less likely than an undetected, uncorrected ECC memory error on the most reliable hardware you can buy. "