On Jan 11, 2011, at 8:51 PM, Edward Ned Harvey wrote: > heheheh, ok, I'll stop after this. ;-) Sorry for going on so long, but it > was fun. > > In 2007, IDC estimated the size of the digital universe in 2010 would be 1 > zettabyte. (10^21 bytes) This would be 2.5*10^18 blocks of 4000 bytes. > http://www.emc.com/collateral/analyst-reports/expanding-digital-idc-white-pa > per.pdf > > This means the current probability of any sha256 collision in all of the > data in the whole world, using a ridiculously small block size, assuming all > of the data is unique and therefore maximizing the probability of > collision... 2.69 * 10^-41 ... hehehehehhe :-) > > It's not as unlikely as randomly picking a single atom in the whole planet, > but still...
... it doesn't matter. Other posters have found collisions and a collision without verify means silent data corruption. Do yourself a favor, enable verify. -- richard _______________________________________________ zfs-discuss mailing list zfs-discuss@opensolaris.org http://mail.opensolaris.org/mailman/listinfo/zfs-discuss
