ABC.com 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 DMX configurations with 15k rpm drives.
How many disks are required for each configuration type?

A.
RAID 5 31 and RAID 1/0 20

B.
RAID 5 43 and RAID 1/0 28

C.
RAID 5 28 and RAID 1/0 18

D.
RAID 5 38 and RAID 1/0 24