Why does opening Safari wake up my sleeping hard drives?

I have the newest of the new, best of the best i7 imac which came with Lion already on it.
I'll be editing in Final Cut Pro X(sigh) and I'll go to Safari to check my email or whatever but whenever I open Safari it wakes up my sleeping hard drives which in turn freeze Safari and Safari doesn't unfreeze until the hard drives are all the way awake?
WHAT THE???

I have it partitioned into 3 volumes - 1 is Time Machine, 1 is completely empty and 1 has a backup of the main drive (cloned using SuperDuper) that gets backed up only once a week.

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bender73 wrote:
is this a known issue? i have to manually turn off/on the Mac's Airport to re-establish USB HD connection (or Time Machine won't find it either).
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Why does opening Safari wake up my sleeping hard drives?

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