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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.
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