What happens in a RAID 50 when a drive fails?

Hey all.
I'm setting up my Xserve RAID and need some advice. Right now it has been populated with 14 drives and set up as two RAID5 arrays. Ideally I would like to software RAID these in Disk Utility to make a RAID50 for the speed increase.
If I were to set up as a RAID50, and then a drive were to fail, what would happen to the RAID? I know that when a drive in a RAID0 fails, there's no parity so your RAID is pretty much gone. I also know that in a RAID5 when a drive fails it can run in a degraded state. I'm just trying to wrap my head around how this translates when you combine the two into a RAID50 and a drive fails. Will half of the data be lost, or will it be fine, just running degraded?

Jeff,
RAID 50 is two RAID 5 arrays striped in a "RAID 0".
Each of the RAID 5 arrays can suffer one hard drive failure, which will cause it to run in degraded mode until the failed drive is replaced and the RAID rebuilt.
Not sure what sort of speed you're looking at, but RAID 30 provides significantly better performance with video and large files.
Duncan

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