Summary

Understanding of disk array technologies is a critical skill for an AIS. This chapter explained the following critical topics with which you should be very familiar in preparation for the AIS exam:

• The advantages of a drive array implementation.

• The various RAID levels, how they differ one from another, and the situations in which each level is best implemented.

• How performance varies, depending on which level of RAID is selected.

• RAID levels supported by HP.

The next chapter introduces concepts relating to Fibre Channel technologies.