Hardware
Hardware includes not only the server itself, but also any associated hardware, including
network devices and other dependent hardware such as domain controllers. The following
are some examples of hardware disasters:
CHAPTER 1 n WHAT IS DISASTER RECOVERY? 6
??? Failed motherboard: A server with a single power supply simply shut down.
After multiple attempts to boot, the client called a vendor technician to bring in
a replacement power supply. Still, the server wouldn??™t clear a power-on self-test
(POST). After further investigation, it appeared the problem was a damaged
motherboard.
??? Damaged cables: A newly purchased cluster was implemented for redundancy.
The client tested it for months before moving it to production. Once in production,
nodes would fail randomly. It turned out that the SCSI cables were bound so
tightly that they were shorting out, briefly disrupting communication with the
disk array and causing random failure events.
??? Complete network failure: Construction crews accidentally severed a primary fiberoptic
line that carried all network traffic between a larger organization and its
more than 4,000 satellite offices.
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