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A customer is deploying a Microsoft Exchange 2003 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 10k rpm drives.
How many disks are required for each configuration type?

A.
For RAID 5, 38 disks; for RAID 1/0, 24 disks

B.
For RAID 5, 31 disks; for RAID 1/0, 20 disks

C.
For RAID 5, 28 disks; for RAID 1/0, 18 disks

D.
For RAID 5, 43 disks; for RAID 1/0, 28 disks