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Don't forget about caching or buffering of data being written by the
hardware RAID controller - this might negate any slowdown due to waiting for
heads to align. I think RAID 0 is for speed only, RAID 1 is disk mirroring,
RAID 5 is disk striping with parity, and the others (2, 3, 4, 10, 50) are
either inferior to 1 and 5 or just marketing attempts. I think all SCSI
hardware RAIDs increase both read and write performance to some degree.
Increasing RAM on a hardware RAID controller might help with video capture -
or maybe you could go with external firewire hard drives - there are
enclosures where you can put in IDE drives you already own.
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