CAS-001 Question #242: Real Exam Question with Answer & Explanation

The correct answer is D: The data may not be in a usable format.. The correct answer is D. Deduplication technology stores data in a proprietary, compressed format by eliminating redundant blocks and replacing them with pointers to a single copy. This deduplicated data is not raw, readable data - it is only meaningful when interpreted by the sa

Question

An administrator is troubleshooting availability issues on a FCoE based storage array that uses deduplication. An administrator has access to the raw data from the SAN and wants to restore the data to different hardware. Which of the following issues may potentially occur?

Options

AThe existing SAN may be read-only.
BThe existing SAN used LUN masking.
CThe new SAN is not FCoE based.
DThe data may not be in a usable format.

Explanation

The correct answer is D. Deduplication technology stores data in a proprietary, compressed format by eliminating redundant blocks and replacing them with pointers to a single copy. This deduplicated data is not raw, readable data - it is only meaningful when interpreted by the same deduplication engine and its associated metadata (the deduplication store). When attempting to restore deduplicated data to different hardware (especially hardware from a different vendor or without the compatible deduplication software), the data may be unreadable or unusable because the destination system cannot reconstruct the original files from the deduplicated blocks. Options A, B, and C describe real SAN concerns but are not specific to the deduplication scenario described.

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