What should the "raid block size" be

I just installed 3, 750 sata barracuda's in my 1 hour old 8 core mac. I am stripping them together with the OS to raid o.
It is asking me what "raid block size" to use:
16k
32k
64k
128k
256k
The help menu suggests that for the most thruput, a higher number might be best...
I will be using this raid for DV & HD video with Final cut studio 2 & AFX cs3.
Not sure which value to use.
Thanks,
Steve

I would not include the OS with your HD & DV storage RAID.
And Apple RAID keeps improving so that you can use smaller default for non-video or audio applications as in CS3 scratch disks.
Booting from RAID has limitations and problems, and I would prefer a dedicated fast drive instead, and isolate the system activity as well which also helps.

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Raid block size ?

i just purchased two firewire 800
500gb external hard drives.
i want to use them as a raid set up for recording audio, (vocals,guitars etc)
or keeping my komplete ultimate 9 sound library on it.
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hope everyone is having a great new year ;-)

Hello d rock,
When creating a RAID array, you'll typically want your block size to match (as closely as reasonable) the size of the files being stored on the array.
...specify an optimal storage block size for the data stored on the set. Set the block size to match the size of data stored on the set. For example, a database might store small units of data, so a small block size might be best. A video processing application might require fast throughput of large amounts of data, so a larger block size might be best.
Disk Utility 12.x: Create a RAID set
http://support.apple.com/kb/PH5834
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Message was edited by: softwater

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What should the "raid block size" be

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