Exam 220-1101 topic 1 question 148 discussion

Pay attention to the words in the question, it says nothing about redundancy. Only answer what the question is actually asking, which is cost-effective. RAID 10 is not cost-effective, due to really only using 50% of the disks' storage capacity.

A RAID 10 array is a redundant array of independent disks that combines the features of both RAID 1 (mirroring) and RAID 0 (striping). This configuration provides both data redundancy and improved read/write performance. By using a RAID 10 array, the VM host can have a cost-effective and reliable storage solution for all VMs that run from the server. The performance of the RAID 10 array can be optimized by selecting the appropriate type of hard drives, such as 7,200rpm or 10,000rpm drives, which are typically less expensive than 15,000rpm drives.

I asked ChatGPT first its said D but when i asked why comptia says C this is the answer: You're right to lean toward D (RAID 10) from a practical, sysadmin or enterprise perspective. But CompTIA wants you to choose C in the context of: Lower budget Single drive setup Basic understanding of VM host requirements

While a 15000rpm drive would be less expensive in dollars, the RAID 10 array provides redundancy. If the "storage will be used for all VMs that run from the server" you need to factor in the cost of losing all the VMs WHEN that single 15k drive fails. A and B are outliers that can easily be eliminated.

D. RAID 10 array. A RAID 10 array provides a good balance of speed, redundancy, and reliability, making it ideal for hosting multiple virtual machines (VMs). It combines the benefits of RAID 1 (mirroring) for redundancy and RAID 0 (striping) for performance, which is important for the intensive read/write operations required by VMs.

Aren't A and C kind of the same answer? rpm is the speed of which the spindel turns at on a HDD. An HDD is an optical drive. I'm a bit confused by this.

The question asks for cost-effectiveness, not redundancy, efficiency, fault tolerance or availability. So RAID 10 would be wildly wrong as that would be the most expensive option there with 4 or more drives.

The best storage device for a rackmount server that will be used as a VM host and will be used for all VMs that run from the server would be a RAID 10 array. RAID 10 is a combination of RAID 1 and RAID 0, which provides both redundancy and performance. It requires at least four disks and provides high read and write speeds, as well as fault tolerance. This makes it an ideal choice for a VM host. An optical disk drive is not a suitable option for this scenario, as it is not designed for use as a storage device for VMs. An eMMC storage device is a type of flash storage that is commonly used in mobile devices. It is not designed for use as a storage device for VMs, as it has limited capacity and performance. A 15,000rpm drive is a type of hard disk drive that provides high performance. However, it is not the best option for a VM host, as it does not provide redundancy

"Cost effective" and nothing about redundancy so D is not the answer

There is nothing mentioned about redundancy (RAID), so it has to be 15,000 rpm

eMMC is a storage used by portable devices like cell phones or tablets. The optical disk drive is the primary use for the archive of data, documents, movies, etc. The question states cost-effective and does not mention anything about a backup. You can back up your data directly into the cloud also. If it is only about money then option C would be right in that situation. However, RAID 10 is a more expensive solution and better at the same time.

A device that will install into a server is a hard drive so the answer should be C: 15,000rpm drive

D. RAID 10 array. A RAID (redundant array of independent disks) 10 array provides both performance and data redundancy, making it a good choice for a VM host. RAID 10 combines the mirroring of RAID 1 with the striping of RAID 0, which provides faster read and write speeds. Additionally, it provides redundancy by using at least four disks to create two mirrored sets of striped drives. This means that if one disk fails, the data is still available on the mirrored disk. Optical disk drives are not suitable for storage of VMs. eMMC storage devices are small, inexpensive storage devices often used in tablets and smartphones, but are not typically used in servers. 15,000rpm drives provide fast read and write speeds, but they are not redundant, so they do not provide data protection in case of a drive failure.

Answer is C. A&B dont make sense and RAID isnt a storage device.

Answer is D

C is the right answer

Cost effective - C