Question 1 Explain how RAID is improving the data redundancy and performance improvement

Question 1

Explain how RAID is improving the data redundancy and performance improvement.
Explain the minimum disk needed to create RAID 1+0, RAID 3, RAID and RAID 6.
Draw a figure of RAID 5 with 7 disks. Mention the content of each disk clearly and use the table in MS office work to create the RAID figure.
Question 2

Explain what is meant by directory service and what are the advantages of the same.
Question 3

Give a brief idea on DHCP, DNS, File and Storage services roles and features in the server.