This job dimension deals with the planning and implementation of a disaster-recovery process and is the topic of 12% of the exam questions. The main points follow:
Disaster recovery is a set of activities that are designed to reduce the likelihood, duration, and impact of a disaster.
To reduce the likelihood of a disaster striking a network server, use redundant hardware in the network server.
Redundancy for hard disk drives is accomplished by implementing RAID (redundant array of inexpensive disks).
RAID 1 (mirroring or duplexing) provides redundancy by duplicating all data on pairs of disk drives.
RAID 5 (striped set with parity) provides redundancy by calculating parity information for each block of data written to the disks ...