Describe Dynamic Pool Expansion, Considerations for Mixing Drive Sizes and the Rebuild Process UNITY-DEPLOY Practice Questions (Page 3)

Questions 11–15

1. 11application · medium

   A Unity XT dynamic pool has 10 x 2 TB NL-SAS drives. The administrator wants to add 5 x 4 TB NL-SAS drives. What is the total usable capacity of the pool after the expansion?

   • AThe expansion will fail because the drive sizes are too different.
   • B35 TB, because the pool averages the drive sizes.
   • C40 TB, because the pool uses the full capacity of all drives.
   • D30 TB, because the pool is limited by the smallest drive size (2 TB).
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2. 12application · medium

   A company has a Unity XT dynamic pool with 10 x 1.92 TB SAS SSDs. They need to add 20 TB of usable capacity. They have 8 x 3.84 TB SAS SSDs available. What is the most important consideration before adding these drives to the pool?

   • AThe pool will automatically rebalance data across all drives, but performance will degrade permanently due to the mixed drive types.
   • BThe larger drives will be limited to the size of the smallest drive in the pool, wasting most of their capacity.
   • CAdding drives of a different size requires creating a new pool and migrating data, as dynamic pools cannot be expanded with different-sized drives.
   • DThe pool will use the full capacity of all drives, providing the expected 20 TB of additional usable space.
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4. 13foundation · easy

   What happens automatically when new drives are added to a Dell Unity dynamic pool?

   • AData is redistributed across all drives in the pool to balance capacity and performance.
   • BThe pool must be taken offline temporarily to incorporate the new drives.
   • CThe pool's RAID level is automatically upgraded to provide more protection.
   • DThe new drives are reserved as spare capacity and are not used for data storage.
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5. 14foundation · easy

   What is a performance impact of mixing drive sizes in a Dell Unity dynamic pool?

   • APerformance is unaffected because the pool uses the fastest drive for all operations.
   • BPerformance degrades only during rebuilds, not during normal operation.
   • CPerformance may be limited by the slowest drive in the pool, as data is distributed across all drives.
   • DPerformance improves because larger drives have higher rotational speeds.
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6. 15expert · hard

   A Unity XT dynamic pool is experiencing a drive failure during a period of heavy production I/O. The administrator is concerned about the performance impact of the rebuild. What is the best course of action to minimize the impact on production?

   • AImmediately replace the failed drive to speed up the rebuild and reduce the performance impact.
   • BPause the rebuild until the production I/O load decreases to avoid any performance impact.
   • CAllow the rebuild to proceed automatically, as the system manages the rebuild priority to balance performance and data protection.
   • DManually set the rebuild priority to high to complete the rebuild as quickly as possible.
   Reveal Solution Discussion Select an answer first