A technician would like to use a cost-effective storage device in a customer's server that will be used as a VM host. This device will be used for all VMs that run from the server. Which of the following should the technician use?

Optical disk drives are primarily designed for reading and writing data on discs, such as CDs and DVDs. They are significantly slower than NVMe devices and are not suitable for hosting VMs due to their limited read/write speeds and higher latency. This makes them an impractical choice for environments requiring high-speed access to multiple VMs.

While 15,000rpm drives provide faster access compared to standard 7,200rpm hard drives, they still cannot match the performance of NVMe storage. Additionally, these drives are typically more expensive and less efficient in terms of power consumption, making them a less cost-effective option for a VM host.

A RAID 10 array combines both mirroring and striping to provide redundancy and improved performance. However, the underlying drives in a RAID 10 configuration can still be traditional HDDs or SSDs that may not offer the same speed as NVMe devices. Thus, while RAID 10 enhances reliability and speed to some extent, it does not match the performance and efficiency of a dedicated NVMe solution.