Correct RAID Configuration for a Four-Drive NAS
Question
A four-drive Linux NAS has been improperly configured.
Each drive has a capacity of 6TB, for a total storage capacity of 24TB.
To reconfigure this unit to be not pluggable for drive replacement and provide total storage of 11TB to 12TB, which of the following would be the correct RAID configuration?
Answers
Explanations
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A. B. C. D.C.
To reconfigure the four-drive Linux NAS with a total storage capacity of 24TB to provide a total storage of 11TB to 12TB and not be pluggable for drive replacement, we need to choose an appropriate RAID configuration.
RAID (Redundant Array of Independent Disks) is a technology used to combine multiple hard drives into a single logical unit to improve performance, reliability, and capacity. Different RAID configurations provide different levels of redundancy, performance, and storage capacity.
To select the appropriate RAID configuration, we need to consider the following factors:
- Total storage capacity required: In this case, we need a total storage capacity of 11TB to 12TB.
- Redundancy: We need to ensure that the data is protected in case of a hard drive failure.
- Pluggability: We need to ensure that the drives are not pluggable for drive replacement.
Let's consider each of the RAID configurations mentioned in the question:
A. RAID 01: RAID 01 is a combination of RAID 0 and RAID 1. It requires a minimum of four hard drives and provides improved performance and redundancy. However, RAID 01 is not suitable for this scenario because it requires all the hard drives to be pluggable for drive replacement.
B. RAID 03: RAID 03 is a combination of RAID 0 and RAID 3. It requires a minimum of three hard drives and provides improved performance and redundancy. However, RAID 03 is not suitable for this scenario because it requires all the hard drives to be pluggable for drive replacement.
C. RAID 10: RAID 10 is a combination of RAID 0 and RAID 1. It requires a minimum of four hard drives and provides improved performance and redundancy. RAID 10 is suitable for this scenario because it provides redundancy without requiring the hard drives to be pluggable for drive replacement. RAID 10 provides 50% storage capacity, so with four 6TB hard drives, the total storage capacity would be 12TB.
D. RAID 50: RAID 50 is a combination of RAID 0 and RAID 5. It requires a minimum of six hard drives and provides improved performance and redundancy. RAID 50 is not suitable for this scenario because it requires six hard drives and provides a higher storage capacity than what is required.
Therefore, the correct RAID configuration for this scenario would be RAID 10.
