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CISSP Training Kit by David R. Miller

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Exercises

In the following exercises, you apply what you’ve learned in this chapter. The answers for these exercises are located in the Answers section at the end of this chapter.

Exercise 10-1

A four-disk RAID 5 array is being used to store important information. In Table 10-2, the Disk 1 data is missing from the RAID 5 array due to a disk failure. Using even parity, calculate the missing data by adding the missing bit for Disk 1, either a 0 or a 1, so that when adding all 4 bits on each stripe (horizontal), the answer is an even number (0, 2, 4). Note that the missing parity information on Disk 1 is in the third stripe and does not need to be calculated during the read function.

Table 10-2. Data and parity information (P)

Bit on disk 0

Bit on disk ...

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