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NS0-157 · Question #343
NS0-157 Question #343: Real Exam Question with Answer & Explanation
The correct answer is D: 64 bit, RAID DP, Snapshot reserve 0. Clustered Data ONTAP 8.2 introduced 64-bit aggregates as the default format, paired with RAID-DP for dual-parity protection and a 0% snapshot reserve at the aggregate level.
Question
In clustered Data ONTAP 8.2, an aggregate by default is _________.
Options
- A32 bit, RAID DP, Snapshot reserve 0
- B32 bit, RAID 4, Snapshot reserve 0
- C64 bit, RAID 4, Snapshot reserve 0
- D64 bit, RAID DP, Snapshot reserve 0
Explanation
Clustered Data ONTAP 8.2 introduced 64-bit aggregates as the default format, paired with RAID-DP for dual-parity protection and a 0% snapshot reserve at the aggregate level.
Common mistakes.
- A. 32-bit is the legacy format from older ONTAP releases; clustered ONTAP 8.2 defaults to 64-bit, making this combination incorrect.
- B. RAID-4 provides only single-parity protection and has not been the default RAID policy since RAID-DP became standard, so this combination is incorrect.
- C. RAID-4 is not the default RAID policy; ONTAP defaults to RAID-DP because dual parity protects against two concurrent disk failures, a critical requirement for large modern aggregates.
Concept tested. Default aggregate settings in clustered ONTAP 8.2
Reference. https://docs.netapp.com/us-en/ontap/disks-aggregates/aggregate-creation-workflow-concept.html
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