What is the approximate cost of replacement and recovery operation per year of a hard drive that has a value
of $300 given that the technician who charges $10/hr would need 10 hours to restore OS and Software and
needs further 4 hours to restore the database from the last backup to the new hard disk? Calculate the SLE,
ARO, and ALE. Assume the EF = 1 (100%).
A.
$440
B.
$100
C.
$1320
D.
$146
The First sentece of the question is missing: The chance of a hard drive failure is once every three years.
Correct. Therefore in this case, the correct answer would be A.$440
D
single loss expectancy = asset value * exposure factor (SLE = AV * EF)
SLE = ($300 + $10/hr*14hr) * 1 = 440
annualized loss expectancy = single loss expectancy * anuualized rate of occurrence (ALE = SLE * ARO)
If the chance of a hard drive failure is once every three years:
ALE = SLE * ARO
ALE = 440 * 1/3 = 146.667
Therefore in this case:
ALE = SLE * ARO
ALE = 440 * 1 = 440