macz wrote:@lundman
wouldnt it depend on how the backup was done?
I mean.. if you are zfs sending and recieving.. zfs knows the delta.. it never reads all the data.. just reads the diff as its sending it? it knows the changes at the block level so only new blocks data get read and transmitted.
and if you are rsync'ing the data.. does it really read each canditate file in its entirety or is it just looking at the delta of the files last modified date, size etc.. ?
now I concur that during an initial backup and all files are transferred they would be checksumed during that backup.. no so sure on delta backups?
macz wrote:Well duh.. you did say tape.. ie not delta.. sorry.. have not seen a tape machine in ages and it didnt even register...
I stand corrected.. hehe
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