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An eight-disk RAID 6 set has a stripe size of 192 KB. What is the stripe depth?

A.
24 KB

B.
32 KB

C.
48 KB

D.
64 KB

Explanation:
RAID Technique – Striping
Strip size (also called stripe depth) describes the number of blocks in a strip, and is the maximum
amount of data that can be written to or read from a single disk in the set, assuming that the
accessed data starts at the beginning of the strip. All strips in a stripe have the same number of
blocks. Having a smaller strip size means that the data is broken into smaller pieces while spread
across the disks.
Stripe size is a multiple of strip size by the number of data disks in the RAID set. For example, in a
five disk striped RAID set with a strip size of 64KB, the stripe size is 320 KB (64KB x 5).
Stripe width refers to the number of data strips in a stripe. Striped RAID does not provide any data
protection unless parity or mirroring is used.
For parity RAID, the stripe size calculation does not include the parity strip. For example in a five
(4 + 1) disk parity RAID set with a strip size of 64 KB, the stripe size will be 256 KB (64 KB x 4).
Calculation
RAID6 = 2x Parity
8 Disk RAID-6 Set = 6 Data + 2 Parity
Strip Size = 192KB / 6 = 32KB
EMC E10-001 Student Resource Guide. Module 3: Data Protection – RAID