Objective 4.5

Plan a Backup and Recovery Strategy

17-33

D. Incorrect: DLT drives support tape capacities of up to 160 gigabytes (uncom-

pressed) and data transfer speeds of up to 960 megabytes per minute. LTO drives

have greater capacities, and LTO and 8mm drives offer faster data transfer speeds.

4.

Correct Answers: C

A. Incorrect: This solution does back up all the files that have changed each day,

but it does not provide the fastest possible recovery solution. Incremental jobs

take longer to restore than differential jobs, and the lack of an ASR backup means

that you must first reinstall the operating system in the event of a server system

disk failure.

B. Incorrect: ASR backups provide for a fast recovery of the operating system in the

event of a server system disk failure, but they only back up operating system files,

and are therefore not a substitute for standard backup jobs.

C. Correct: An ASR backup, in combination with daily differential backups, protects

all the files changed during each day’s work and also provides the fastest possible

recovery. In the event of a server system disk failure, you only have to restore

from the ASR backup, the most recent full backup, and the most recent differential

backup.

D. Incorrect: Performing a full backup every night protects all the files that users

change each day, but it does not provide the fastest recovery, since you must rein-

stall the operating system before you can restore files from the backup.