Describe Dynamic Pool Expansion, Considerations for Mixing Drive Sizes and the Rebuild Process UNITY-DEPLOY Practice Questions (Page 1)

Questions 1–5

1. 1foundation · easy

   In a Dell Unity dynamic pool, what happens when a drive fails and there is spare capacity available in the pool?

   • AThe pool is taken offline until the failed drive is replaced.
   • BThe pool uses spare capacity to rebuild the data from the failed drive onto other drives in the pool.
   • CThe failed drive is immediately replaced with a new drive from the vendor.
   • DThe pool continues to operate with reduced capacity, but no rebuild occurs until a replacement drive is installed.
   Reveal Solution Discussion Select an answer first
2. 2expert · hard

   A Unity XT dynamic pool has 8 x 2 TB NL-SAS drives. The administrator wants to add 4 x 4 TB NL-SAS drives. The pool is currently 90% full. What is the most significant risk of this expansion?

   • AThe pool will experience a permanent performance degradation due to the mixed drive sizes.
   • BThe pool will only gain 8 TB of usable capacity, which may not be enough to alleviate the capacity pressure.
   • CThe rebalancing process will cause data loss because the pool is too full.
   • DThe expansion will fail because the pool is too full.
   Reveal Solution Discussion Select an answer first
4. 3application · easy

   A Unity XT dynamic pool has 6 x 2 TB drives. The administrator adds 6 x 2 TB drives to the pool. What is the total usable capacity of the pool after the expansion?

   • AThe expansion will fail because the pool already has 6 drives.
   • B12 TB, because the pool only uses the capacity of the original drives.
   • C24 TB, because all drives are the same size and the pool uses the full capacity of each drive.
   • D18 TB, because the pool averages the capacity of the original and new drives.
   Reveal Solution Discussion Select an answer first
5. 4application · medium

   A Unity XT dynamic pool has 10 drives and one drive fails. The pool has distributed spare capacity. What is the impact on the pool's usable capacity after the rebuild completes?

   • AUsable capacity remains the same because the failed drive is replaced by the distributed spare.
   • BUsable capacity increases because the failed drive's data is compressed during the rebuild.
   • CUsable capacity is not affected because the pool automatically adds a new drive from inventory.
   • DUsable capacity is reduced by the amount of distributed spare capacity consumed by the rebuild.
   Reveal Solution Discussion Select an answer first
6. 5application · medium

   A UnityVSA environment has a dynamic pool with 6 x 1 TB virtual drives. The administrator wants to add 4 x 2 TB virtual drives to increase capacity. What is the expected usable capacity increase?

   • AThe expansion will fail because drive sizes cannot be mixed in a dynamic pool.
   • B4 TB, because the pool is limited by the smallest drive size.
   • C8 TB, because the pool uses the full capacity of all drives.
   • D6 TB, because the pool averages the drive sizes.
   Reveal Solution Discussion Select an answer first