COMPTIA-SK0-005 practice question 33 of 35

A storage administrator is investigating an issue with a failed hard drive. A technician replaced the drive in the storage array; however, there is still an issue with the logical volume. Which of the following best describes the NEXT step that should be completed to restore the volume?

Full set: 493 questions
Answer options
A: Initialize the volume
B: Format the volume
C: Replace the volume
D: Rebuild the volume Correct answer
Correct Answer:
D. Rebuild the volume
Explanation

In a redundant storage array (such as RAID 1, 5, 6, or 10), when a failed physical drive is replaced, the array enters a degraded state. The logical volume built on this array will not be fully functional or fault-tolerant until the data from the failed drive is reconstructed onto the new replacement drive. This process is called a "rebuild." The RAID controller uses the data and parity information from the remaining healthy drives to regenerate the missing data onto the new drive, thereby restoring the volume's redundancy and integrity.

Why Incorrect

A. Initialize the volume: This is a destructive action that prepares a new disk for use by writing a signature, effectively erasing any data and preventing recovery.
B. Format the volume: This process creates a file system on a volume, which is also destructive and would erase all data on the logical volume.
C. Replace the volume: The physical hard drive was replaced, not the logical volume. Replacing the volume would involve deleting it and creating a new one, resulting in data loss. ---

References

1. Dell PowerEdge RAID Controller 11 User’s Guide. (Official Vendor Documentation)

Reference: Section 6.6

"Rebuilding a physical disk

" Page 53.

Quote: "Rebuilding is the process of regenerating data to a physical disk from other physical disks in the virtual disk. Rebuilding is necessary when a physical disk that is part of a virtual disk is replaced. You can rebuild a physical disk that is part of a redundant virtual disk

provided the state of the virtual disk is Degraded."

2. HPE Smart Array SR Gen10 Controller User Guide. (Official Vendor Documentation)

Reference: Chapter "Maintaining data

" Section "Rebuilding a logical drive

" Page 78.

Quote: "When a drive fails in a fault-tolerant configuration

the controller uses the remaining drives in the array to continue requesting data. When you replace the failed drive

the controller rebuilds the data on the replacement drive."

3. Patterson

D. A.

& Hennessy

J. L. (2017). Computer Organization and Design RISC-V Edition: The Hardware Software Interface. Morgan Kaufmann. (Peer-Reviewed Academic Publication/Textbook)

Reference: Chapter 5

"Large and Fast: Exploiting Memory Hierarchy

" Section 5.10

"Redundant Arrays of Inexpensive Disks

" subsection "RAID 5: High I/O Rates and High Data Transfer Rates

" Page 421.

Paraphrased Content: The text explains that in RAID 5

if a drive fails

the lost information can be reconstructed from the remaining drives. The process of creating this information on a new

replacement drive is referred to as a "rebuild."

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