Disk shadowing is an example of a fault tolerance applied at what level?
A) Network communications
B) DASD
C) Transaction
D) CPU processor

Question

Quizplus · Accepted Answer

Disk shadowing is a method of providing fault tolerance for disk storage. It involves maintaining a duplicate copy (shadow copy) of data on a second disk. In case of a failure in the primary disk, the system automatically switches to the secondary disk, thus providing uninterrupted service. This is applied at the DASD (Direct Access Storage Device) level.

Disk Shadowing Is an Example of a Fault Tolerance Applied