Which of the following are the three classifications of RAID identified by the RAID Advisory Board?
A.
Failure Resistant Disk Systems (FRDSs), Failure Tolerant Disk Systems, and Disaster Tolerant Disk
Systems.
B.
Foreign Resistant Disk Systems (FRDSs), Failure Tolerant Disk Systems, and Disaster Tolerant Disk
Systems.
C.
Failure Resistant Disk Systems (FRDSs), File Transfer Disk Systems, and Disaster Tolerant Disk Systems.
D.
Federal Resistant Disk Systems (FRDSs), Fault Tolerant Disk Systems, and Disaster Tolerant Disk
Systems.
Explanation:
The RAID Advisory Board has defined three classifications of RAID: Failure Resistant Disk Systems (FRDSs),
Failure Tolerant Disk Systems, and Disaster Tolerant Disk Systems. As of this writing only the first one, FRDS,
is an existing standard, and the others are still pending. We will now discuss the various implementation levels
of an FRDS.
Failure Resistant Disk System: The basic function of an FRDS is to protect file servers from data loss and a
loss of availability due to disk failure. It provides the ability to reconstruct the contents of a failed disk onto a
replacement disk and provides the added protection against data loss due to the failure of many hardware parts
of the server. One feature of an FRDS is that it enables the continuous monitoring of these parts and the
alerting of their failure.
Failure Resistant Disk System Plus: An update to the FRDS standard is called FRDS+. This update adds the
ability to automatically hot swap (swapping while the server is still running) failed disks. It also adds protection
against environmental hazards (such as temperature, out-of-range conditions, and external power failure) and
includes a series of alarms and warnings of these failures.Incorrect Answers:
B: Foreign Resistant Disk Systems is not one of the three classifications of RAID identified by the RAID
Advisory Board.
C: File Transfer Disk Systems is not one of the three classifications of RAID identified by the RAID Advisory
Board.
D: Federal Resistant Disk Systems is not one of the three classifications of RAID identified by the RAID
Advisory Board.Krutz, Ronald L. and Russell Dean Vines, The CISSP Prep Guide: Mastering the CISSP and ISSEP Exams,
2nd Edition, Wiley Publishing, Indianapolis, 2004, p. 144