Protecting your systems from power problems | ||
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8 December 2002 Power problems are the most common cause of computer hardware failures.
How do you protect your computer from disruptions to the power supply? During last week's bushfires in Sydney a fire under power lines caused 39 power
problems across the city in two hours. The surges damaged hundreds of computers
and lost thousands of hours work. There are three typical power problems that damage electrical equipment.
A blackout is where the power stops, a brownout where the supply drops below
normal and a power surge where the voltage goes above normal. All can damage
hardware and data. Power surges are the most dramatic. Typically a power surge will blow a modem
or power supply and sometimes a motherboard. Brownouts and blackouts can damage
drives and all power disruptions can corrupt data. Protecting against power problems Buildings and homes can be protected against power surges at the switchboard.
A licenced electrician can supply and install surge protection. This solution
also protects other electrical equipment like stereos and televisions against
surges. At the power point basic protection against power surges can be had in a
surge protected powerstrip that sells for between 20 and 100 dollars. The
more expensive ones also protect telephone line. These strips only protect
against one surge so if you have them, install them where you can easily see
if the protection has been blown. An Uninterruptable Power Supply is a better solution as it protects against
multiple surges, blackouts and brownouts. Basically a UPS is a big battery
that kicks in during a brownouts or blackouts and maintains the power for
a short period of time. Expect to pay $200 upwards for a UPS, the bigger the
battery the more expensive the unit. Most UPS systems have software that will close your computer down. This is
important for servers that may be left on with files open. For home and small
offices it is a useful feature that can protect your computer while you arent
there. Home/Home offices A home computer should have a basic UPS on the system. Remember to protect
the phone line as well. A home office UPS will cost around $250.00. Dont bother protecting printers, speakers, and other peripherals. Only
protect the computer and modem. To save work during a blackout your monitor
will also have to be protected as well. Offices The server, hub and router should be protected through a UPS. This will protect
the server and network. If you want the workstations to be able to save their
work during a power disruption youll need one on each workstation as well. A UPS to support a server, router and switch/hub will cost around $750. A
Workstation UPS should cost around $250. Be generous with sizing a UPS as
their batteries and circuits are damaged by incorrect loads. Never, ever, connect a laser printer to a UPS. This is a quick way to damage
a UPS. Anyway, printing can wait until later, during a power disruption the
priority is to save your hardware and work. UPS tips and tricks Only connect whats necessary for Power protection. Desktops should
only protect the computer, monitor and modem. Servers should also protect
any hubs and routers. Choose the right connection method for the communication cable. Older computers
and Win95/NT machines wont be able to talk to a UPS that only has a USB
connector. IF you have a modem/DSL connection make sure the phone line is protected.
Telephone lines are much more likely to suffer from power surges. Power surges
are probably the most common way to lose a modem. While power protection can appear to be expensive, it isnt. Almost
every computer will suffer some sort of power related problem in its
life. Replacing two blown modems or one damaged power cost more than a UPS.
Lost data can be irreplaceable.
PC Rescue Pty Ltd
Suite 236, 4 Young Street Neutral Bay NSW 2089
ABN 082 635 765
ŠTechnology Publishing Australia, 2011