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Hi the BSD Now team,

Some time ago I overheard a discussion about backups which made me think. In particular the verification part.

When bits leaves the hard drive out of the computer through the wire to another computer to another hard drive (or tape or fash drive). What makes sure that bits left first computer are exactly the same as bits being written and verified being written (not just blindly written) on another computer?

I’m asking about ZFS (of course).

What to look out when moving data around? Does ZFS runs verification automatically or a user has to do something?

Does it verify on the fly that written data on other disk is the same as read one from the original drive?

Thanks in advance.

Best regards,
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