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June 2000
TIPS & TRAPS
By Lowell Rapaport
Keep The Scanners Running
High-availability features on storage systems and servers are a given, but you wont find too
many on high-end scanners. If scanners go down in a high-volume environment, documents can quickly
backlog and business activity grind to a halt.
How can you ensure that your scanners will be there when you need them? To improve scanning uptime,
follow these tips:
1. Set up redundant scanners at central production facilities. Most choose a combination of one or more
production scanners and one or more back-up mid- or low-speed scanners. The higher-end machine(s)
should be able to handle your average daily workloads, while the lower-end backups will take up peak
loads or keep things moving if the main scanner(s) goes down. Its not a bad idea to have
separate scanners on separate, isolated power systems. Fire suppression systems should be dry rather
than water-based to preserve documents and equipment in the event of a fire.
2. Spread your scanning over several workstations. This is a variation of the dont put all
your eggs in one basket rule. Each scanner should have its own computer. You might also consider
a distributed scanning environment in which the people closest to the paper scan where they work. This
can lower scanning and shipping costs while capturing documents earlier.
3. Choose between high-volume scanners or mid- to low-volume scanners. Production scanners are more
robust, and their manufacturers offer 24-hour replacement and service contracts. Low-speed scanners
are easier to deploy in larger numbers and may be a better choice in shops where loads vary widely.
4. Keep spare parts on hand. Scanners, like printers, are mechanical devices that suffer wear and tear.
Most include a number of user-replaceable components including lamps and rollers. Keep extra parts on
hand.
5. Clean and maintain your scanner on a regular basis. All paper generates paper dust, which builds up
and affects image quality and paper transport. Vacuum or blow out the transport at least once per
week. Clean rollers with isopropyl alcohol or a manufacturer-recommended cleaning fluid. Higher-end
scanners include calibration kits and/or software. Calibration adjusts for changes in bulb intensity
and improves image quality. Recalibrate monthly or weekly depending on scanning volumes.
Set Up a Sticky Trap To Catch Malicious Hackers
If your system is plagued with break ins by malicious hackers, you can lure them away from your
real network and find out how they operate with a honey pot. A honey pot is a computer that is set
up as an ordinary server behind your fire wall. Using packet sniffers and applications
designed to trace visitors and track changes as they are made, you can learn how these hackers (or
crackersas some call them) work where and how theyre entering your system,
what types of viruses theyre downloading and what types of information theyre looking
for.
Set up the honey pot with sweet offerings by giving it a high-profile tag like Name Server
or Mail Server. Then sit back and watch the lure work.
Be sure to wall off a honey pot from the rest of your network, and make sure it cant be used to
mount attacks on other systems by blocking outbound traffic at the fire wall.
Cram Course: Have a Sip of WINE
Though the Linux operating system has gained popularity and a growing number of mainstream
applications are being written for it, few specialized applications have been developed for vertical
markets. How can longtime Windows developers build Linux applications without reprogramming their
products from the ground up?
It turns out that the open software movement has had a solution since 1993 with WINE (Windows on
Unix), which makes DOS, Windows 3.1, and 32-bit APIs available on Unix and Linux systems. Some
applications may be able to run unmodified on Linux under the WINE APIs, but most require some amount
of reworking. With WINE, however, the number of modifications needed to port applications from Windows
to Linux is reduced.
WINE is open source, which means developers can modify it to suit applications. It is distributed
under the Berkeley Software Distribution license, so software projects that incorporate WINE
dont have to be distributed as free or open source. WINE supports winsock.dll and other
important Windows libraries. Each application that runs with WINE functions in its own protected
memory space. If the application crashes, the rest of the system remains safe. Applications using WINE
should run at or near full speed.
WINEs downside is its restriction to x86 implementations of Linux and Unix. If you are running
Linux on a PowerPC or Solaris on a Sparq, WINE will not work. Also, WINE doesnt talk directly to
hardware.
For more information, visit: www.winehq.com;
www.willows.com; and www.codeweavers.com.
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