Question 52

RAID 10 array is the best choice for VM storage in a rackmount server.

Using a RAID 10 array offers a balance of performance and redundancy, making it ideal for hosting multiple virtual machines (VMs) on a server. It combines the benefits of striping and mirroring, which enhances both speed and data protection.

A) Optical disk drive

An optical disk drive is not suitable for VM storage due to its slow read and write speeds compared to hard drives and SSDs. Additionally, optical media has limited storage capacity and durability, making it impractical for the demands of virtual machine operations.

B) eMMC storage device

While eMMC storage devices are cost-effective and provide decent performance, they generally do not offer the same level of speed and reliability as traditional hard drives or SSD arrays. For a VM host, the performance requirements are typically higher than what eMMC can reliably provide.

C) 15,000rpm drive

A 15,000rpm drive offers high performance and speed, which is beneficial for VM operations. However, it lacks the redundancy and fault tolerance that a RAID 10 array provides. This makes it a less favorable option for environments where data integrity and uptime are critical.

D) RAID 10 array

RAID 10 is the optimal choice as it not only provides high performance through data striping but also ensures data redundancy through mirroring. This combination allows for fast read/write speeds and protects against data loss in case of a drive failure, making it the most suitable option for a VM host.

Conclusion

The RAID 10 array stands out as the best option for a storage device in a rackmount server intended for virtual machines due to its superior performance and redundancy capabilities. Other options, such as the optical disk drive, eMMC storage device, and 15,000rpm drive, either lack sufficient capacity, speed, or data protection, failing to meet the critical needs of a VM hosting environment.