Identify FEC Data Protection Levels, File Striping, and Reed-Solomon Protection Definitions POWERSCALE-DEPLOY Practice Questions (Page 3)

Questions 11–15

1. 11expert · hard

   A PowerScale cluster uses Reed-Solomon protection with +2d:1n. The administrator notices that a file is striped across 4 nodes. How does Reed-Solomon ensure that the file can be read if one of the nodes fails?

   • AThe cluster uses parity blocks to reconstruct the missing data from the failed node.
   • BThe cluster waits for the node to be replaced before serving the file.
   • CThe file is duplicated on another node, so it can be read from the copy.
   • DThe cluster reads the file from a snapshot taken before the failure.
   Reveal Solution Discussion Select an answer first
2. 12expert · hard

   A PowerScale cluster has 3 nodes, each with 8 drives. The administrator wants to configure the highest possible protection level. What is the limiting factor for the maximum FEC protection level?

   • AThe total number of drives in the cluster.
   • BThe number of nodes in the cluster.
   • CThe total storage capacity of the cluster.
   • DThe network bandwidth between nodes.
   Reveal Solution Discussion Select an answer first
4. 13expert · hard

   A PowerScale cluster has 5 nodes. The administrator wants to ensure that a file can be read even if two nodes fail simultaneously. The file is striped across all nodes. What is the minimum FEC protection level required?

   • A+3n
   • B+1n
   • C+2d:1n
   • D+2n
   Reveal Solution Discussion Select an answer first
5. 14expert · hard

   A PowerScale cluster uses +2d:1n protection. A node fails, and during reconstruction, a drive in another node fails. The cluster is now experiencing two drive failures and one node failure. What is the status of the data?

   • AData is partially lost, and only some files can be recovered.
   • BThe cluster enters a degraded state and requires immediate manual intervention.
   • CData is still protected, and the cluster can reconstruct all data.
   • DData is lost because the protection level is exceeded.
   Reveal Solution Discussion Select an answer first
6. 15application · medium

   A PowerScale administrator is explaining data protection to a new team member. The team member asks why Reed-Solomon erasure coding is used instead of simple mirroring for a +2d:1n protection level. What is the primary advantage of Reed-Solomon in this context?

   • AIt provides real-time error correction during data reads without any performance overhead.
   • BIt duplicates data across multiple nodes to ensure high availability with minimal capacity overhead.
   • CIt compresses data blocks before writing to reduce the total storage footprint.
   • DIt allows the system to recover data from any combination of two drive failures and one node failure using parity blocks.
   Reveal Solution Discussion Select an answer first