10.5: Exclude local iDisk mirror disk from Time Machine

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10.5: Exclude local iDisk mirror disk from Time Machine | 6 comments | Create New Account

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10.5: Exclude local iDisk mirror disk from Time Machine
Authored by: ferret-slayer on Thu, Nov 8 2007 at 10:01AM PST

Hopefully, a future update to Time Machine will have special provisions for these large, frequently-updated files....

That would be ZFS. A ZFS "snapshot" would only include those disk-sectors that have changed since the last snapshot.
TM currently uses HFS+, and has to copy the entire file if a single byte changes.