H19-338_V3.0 · Question #319
OceanStor 100D uses NVDIMMs as cache, which can prevent data loss during power failure.
The correct answer is A. Yes. A (Yes) is correct because NVDIMMs (Non-Volatile Dual In-line Memory Modules) combine the speed of DRAM with the persistence of NAND flash storage. In the OceanStor 100D, NVDIMMs serve as write cache, and when power fails, any data held in the volatile DRAM portion is…
Question
OceanStor 100D uses NVDIMMs as cache, which can prevent data loss during power failure.
Options
- AYes
- BNo
How the community answered
(21 responses)- A76% (16)
- B24% (5)
Explanation
A (Yes) is correct because NVDIMMs (Non-Volatile Dual In-line Memory Modules) combine the speed of DRAM with the persistence of NAND flash storage. In the OceanStor 100D, NVDIMMs serve as write cache, and when power fails, any data held in the volatile DRAM portion is automatically flushed and preserved in the integrated flash - so no in-flight cache data is lost.
B (No) is wrong because it assumes cache is purely volatile (like standard DRAM), which would lose data on power loss. NVDIMMs specifically solve this problem - that's their defining advantage over ordinary RAM-based cache.
Memory tip: Think of NVDIMM as a "battery-backed USB stick in RAM form" - the NV stands for Non-Volatile, meaning it survives power loss. If you see NVDIMMs mentioned as cache, they inherently imply power-loss protection.
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