Question : Problem: Raid 5 physical array question

Hi all,
I am new to raid and wondering if I am doing this correctly. I have an HP Smart Array on which I plan to place MSExchange database on one volume (RAID 5) and Exchange Transaction logs on another (RAID 1+0). The array contains a total of 10 drives.

My question is..Do i create 1 physical array partitioned in 2 logical drives - one logical drive will be raid 0+1 and the other logical drive will be raid 5. Does that make sense ?

or is it better to create 2 physical arrays - 1st array will be raid 0+1 and second array raid 5 ?

Answer : Problem: Raid 5 physical array question

That is correct.

To quote HP: "A RAID 5 logical drive fails if two physical drives fail. "
The higher number of physical disks you have in the array, the higher the chance of a critical failure (weaker redundancy)

Next quote: "A RAID 1+0 logical drive fails if any two failed physical drives are mirrored to each other."
Meaning this one could fail if two physical disks fail, but it can also survive with up to half of the physical disks failed.

Reference:
http://bizsupport2.austin.hp.com/bc/docs/support/SupportManual/c00729544/c00729544.pdf
Page 76