If you use the cat /dev/hda > /dev/hdc command using the Empeg alone, it takes around 2.5 days each to copy a 250GB Drive. That's 5 days of time for a 500GB file system, but it does work.
Once again, it points to the stability of the hardware design to be able to do this for a continuous time and not have it panic or croak.
Good work guys!
cat (treating it as a char device) is likely to be a lot slower than the nearest dd bs=512 equivalent. A dd with bs=1M is likely to be fairly optimal (no memory pressure and a good tradeoff), but I've never experimented
Hardware really should be that stable! If it fell over after a week of constant transfer I'd still consider it flaky...
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