In a media surveillance system that must stay operational after two disk failures with the fastest rebuild, which storage feature best fits this requirement?

In a media surveillance system that must stay operational after two disk failures with the fastest rebuild, which storage feature best fits this requirement?

• A. Dynamic Disk Pools
• B. RAID 6 on E-Series
• C. RAID 10
• D. RAID 5 with hot spare

Answer: (A)

Maintaining operation after two disk failures with the fastest possible rebuild hinges on how data is distributed and how quickly the system can reconstruct it in parallel. Dynamic Disk Pools treat drives as flexible pools where data and parity are spread across many disks. When a drive fails, the system can rebuild the lost data using the information on the remaining drives without waiting for a single patio rebuild, and this rebuild work is performed in parallel across the pool. That parallelism reduces rebuild time and keeps I/O flowing, which is crucial for a media surveillance system that must stay online even as multiple disks fail. In contrast, traditional RAID setups either rely on two-disk fault tolerance with parity (which can still suffer long rebuild times on large arrays) or require mirroring that increases capacity usage and doesn’t always scale the same way. A RAID level that tolerates two failures can still be slower to rebuild, and RAID with a hot spare in some configurations doesn’t guarantee the same level of continuous availability during the second failure. So the dynamic pool approach provides both resilience to multiple failures and faster rebuild by distributing and rebuilding data in parallel across a pool of disks, making it the best fit for continuous operation under two disk failures with quick recovery.

Maintaining operation after two disk failures with the fastest possible rebuild hinges on how data is distributed and how quickly the system can reconstruct it in parallel. Dynamic Disk Pools treat drives as flexible pools where data and parity are spread across many disks. When a drive fails, the system can rebuild the lost data using the information on the remaining drives without waiting for a single patio rebuild, and this rebuild work is performed in parallel across the pool. That parallelism reduces rebuild time and keeps I/O flowing, which is crucial for a media surveillance system that must stay online even as multiple disks fail.

In contrast, traditional RAID setups either rely on two-disk fault tolerance with parity (which can still suffer long rebuild times on large arrays) or require mirroring that increases capacity usage and doesn’t always scale the same way. A RAID level that tolerates two failures can still be slower to rebuild, and RAID with a hot spare in some configurations doesn’t guarantee the same level of continuous availability during the second failure.

So the dynamic pool approach provides both resilience to multiple failures and faster rebuild by distributing and rebuilding data in parallel across a pool of disks, making it the best fit for continuous operation under two disk failures with quick recovery.