Free NS0-516 sample questions

Correct answer: Dynamic Disk Pool (DDP)

Dynamic Disk Pools (DDP) dynamically distribute data, parity, and preservation capacity across all drives in the pool. This architecture allows for significantly faster rebuild times compared to traditional RAID Volume Groups, as all drives participate in the reconstruction. It also permits adding drives individually rather than in RAID sets.

Correct answer: To provide distributed reserved space across all drives for rebuilding data upon drive failure.

In a Dynamic Disk Pool (DDP), there are no dedicated hot spares. Instead, preservation capacity is distributed across all drives in the pool. When a drive fails, this reserved space is used to reconstruct the lost data, allowing the pool to return to an optimal state without requiring a physical hot spare drive. pie title DDP Drive Capacity Distribution "User Data" : 70 "Parity Data" : 15 "Preservation Capacity" : 15

Correct answers: The target (storage array) must have a CHAP secret configured.; The initiator (host) must have a CHAP secret that matches the target's expected secret.

To establish CHAP authentication, the target (the E-Series array) must be configured with a CHAP secret that the initiator uses to authenticate itself.

The host initiator must be configured with the corresponding CHAP secret so it can successfully authenticate to the storage array target.

Correct answer: The SMTP mail server address and the sender/recipient email addresses.

To configure email alerts in SANtricity System Manager, you must provide the SMTP mail server address (and credentials if required), the sender email address, and at least one recipient email address to receive the notifications.

Correct answer: RAID 10 Volume Group

RAID 10 Volume Groups provide the highest write performance and lowest latency because there is no parity calculation overhead. While DDP is excellent for rebuilds and ease of management, RAID 10 is the optimal choice when absolute maximum write IOPS is the primary requirement.

Correct answer: The preservation capacity reserved for rebuilds and the parity overhead.

When sizing a DDP, the usable capacity is the total physical capacity minus the parity overhead (similar to RAID 6 distribution) and the preservation capacity (reserved space for rebuilding data in the event of drive failures).