1Y0-401 · Question #172
How should the architect design the optimal write cache storage?
The correct answer is B. By implementing RAID 10 on XenServer shared storage. To design optimal write cache storage in a virtualized environment, an architect should prioritize high performance for writes and strong data redundancy.
Question
Options
- ABy implementing RAID 5 on XenServer local storage
- BBy implementing RAID 10 on XenServer shared storage
- CBy implementing RAID 3 on a NAS device
- DBy implementing RAID 6 on a server hosting the CIFS share
How the community answered
(35 responses)- A3% (1)
- B80% (28)
- C6% (2)
- D11% (4)
Why each option
To design optimal write cache storage in a virtualized environment, an architect should prioritize high performance for writes and strong data redundancy.
RAID 5 offers good redundancy and read performance but has slower write performance due to parity calculations, and local storage lacks shared access and high availability.
RAID 10 provides excellent write performance through striping and high data redundancy through mirroring, making it ideal for write-intensive operations like caching. Implementing it on XenServer shared storage ensures high availability and flexible management across multiple hosts.
RAID 3 is an older, less commonly used RAID level and is not generally recommended for optimal write cache storage due to its specific parity implementation.
RAID 6 provides strong data protection but its write performance is typically lower than RAID 10 due to dual parity calculations, making it less optimal for write caching.
Concept tested: Optimal write cache storage design for virtualization
Source: https://learn.microsoft.com/en-us/windows-server/storage/disk-management/raid-levels-overview
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