At 10:19 PM +0100 10/16/2009, Mike wrote:
>dual 1.25 ghz firewire800, with 2gigs of ram ... Leopard.
>
>assuming I get [atto ul3d pci scsi card & raid] working, I'll be 
>running two of the disks as a raid 0, mainly just to have a roomier 
>boot volume (two 36gb drives better than one), and any performance 
>gain would just be a bonus.

I've read that you can raid 0 your boot volume; never seen it.  IMO, 
it's not a good plan - there are just too many ways that systems get 
screwed up.  Adding the problem of having your data spread out across 
multiple spindles (raid 0, data striping)... what a debug nightmare.

Just leave your boot volume alone, on the internal ide bus.  If you 
see, with Activity Monitor, that your i/o demand is swamping it, then 
*maybe* consider moving the swapfiles.  (Except for doing some 
real-time data capture WHILE encoding, in a single-drive 
configuration, I've never seen OS X truly swamp out its boot volume). 
Use your raid array for your user big data, high-demand video work, 
etc etc etc.

FWIW,
- Dan.
-- 
- Psychoceramic Emeritus; South Jersey, USA, Earth.

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