Question

one of your customers wants you to build a personal server that he can use in his home. one of his concerns is making sure that he has at least one data backup stored on the server in the event that a disk fails. you have decided to back up his data using raid. since this server is for personal use only, the customer wants to keep costs down. therefore, he would like to keep the number of drives to a minimum. which of the following raid systems would best meet the customer’s specifications? raid 0 raid 10 raid 1 raid 5

Explanation:

1. RAID 0 offers no data redundancy, so it fails if one disk fails, which does not meet the backup requirement.
2. RAID 10 requires a minimum of 4 drives (combining RAID 0 and RAID 1), which is not the minimum number of drives for redundancy.
3. RAID 1 only requires 2 drives, mirroring data between them. If one disk fails, the other retains all data, meeting the redundancy need with the lowest number of drives.
4. RAID 5 requires a minimum of 3 drives, using parity for redundancy, which uses more drives than RAID 1.

Answer:

RAID 1