When I right click on a file, a list of suitable applications shows 
(from the launch services plist, I believe). My list contains 
duplicates, and there's sometimes a delay as the list appears. Every so 
often I clear the launch services database (with Onyx), but the 
duplicates eventually return. I have a theory, but not a solution, and 
wonder if anyone can advise.

I run a Mac Pro and one of the drive bays contains a disk that is a 
clone of my startup disk. SuperDuper updates this daily, and its an 
emergency backup if my startup drive fails. (I haven't yet changed to 
Leopard and Time Machine, but will switch when Snow Leopard arrives.). I 
think that launch services is looking at this cloned disk and uses the 
apps on it to populate the launch services plist. Sometimes, when I 
right-click a file, the slight delay is accompanied by a drive spinning 
up - and I think this confirms my theory.

Can anyone confirm my thoughts? Is there a way of stopping launch 
services looking at the cloned disk? Spotlight is already blocked from 
indexing this clone. Or is there a way of putting that cloned backup 
disk offline, until its needed for update by SuperDuper once a day?

Thanks, Graham


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