Elaine wants to back up the contents of network-attached storage (NAS) devices used in a critical department in Scott's company. She is worried about how long it would take to restore the device if a significant failure occurred, and she is less concerned about the ability to recover in a natural disaster. Given these requirements, which of the following types of backup should she use for the NAS?

In this case, the best fit to Elaine’s demands is a second network-attached storage (NAS) device with a full copy of the primary NAS. In a failure scenario, the secondary NAS can simply take the place of the primary NAS while individual disks or even the whole NAS is replaced. Tape-based backups take longer to restore, regardless of whether they are full or incremental backups, although incremental backups can take more time in some cases since swapping tapes in order can add time to the restoration process. Finally, a cloud-based backup system would be useful if Elaine was worried about a local disaster but would be slower than a local identical NAS, thus not meeting Scott’s primary requirement.