A customer is deploying a new Microsoft Exchange environment and has requested assistance with the associated disk design. They are deploying Exchange for 850 users with an average of 3 I/Os per user.
They expect a 60% read and 40% write distribution.
The customer would like to know the number of disks required for both RAID 5 and RAID 1/0 CLARiiON configurations with 10k rpm drives. How many disks are required for each configuration type?

A.
RAID 5 28 and RAID 1/0 18

B.
RAID 5 31 and RAID 1/0 20

C.
RAID 5 38 and RAID 1/0 24

D.
RAID 5 43 and RAID 1/0 28