2.3. Selecting the appropriate RAID level
In the previous section, we looked at a method for determining the number of disks we need in order to deliver the required I/O performance. This process included adjustments to take into account redundant disks used to provide protection against disk failure. Designing disk redundancy with RAID is the focus of this section.
A good server design is one that has no, or very few, single points of failure. Among the most common server components that fail are disks. Contributing factors include heat and vibration. A good data center design recognizes this and takes measures to reduce failure rates, such as locating servers in temperature-controlled positions with low vibration levels.
Despite environmental ...