Differences in su/sw values for hw vs. sw RAID 5?

[bridavis@xxxxxxxxxxx]

I getting conflicting reports as to how I should generate my sunit/swidth 
vaules for hardware RAID 5.

Setup: hardware RAID 5, 3 disks at 300 GBs each, 64k stripe size.

Originally, following the man page and the mailing list archives, I came up 
sw=2,su=64k. 

However, I read a reply to an earlier question I sent to the list, and it 
indicated that the hardward RAID should be treated as a single disk, so I came 
up with sw=1,su=128k.

Which one is correct for my setup?

Thanks!

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