With any newly installed computer data backup system, don't assume
everything works correctly right out of the box. Even more important,
don't take for granted that your backup system will continue working
indefinitely. You need periodically to restore some folders and
files from your backup media to validate that your computer data
backup system still works.
If your automated computer data backup routine is configured
to include a verify run with each backup job, testing a sample
restore job monthly should be adequate. However, if you have an
extremely low tolerance for risk, you may want to simulate a sample
restore job once a week.
The Hazard of Moving Parts and Open Design with Computer
Why do you need to take these precautions if you’re purchasing
a reliable, business-class computer data backup system to start
with? Typically, a tape drive or other backup device is one of
the few components in a PC or server that still have moving parts.
As a result, it’s more prone to mechanical failure. In addition,
because a backup device generally is open, as opposed to the sealed
design of a hard drive, it’s easy for the inside of the computer
data backup system device to attract a significant dust buildup
in a relatively short period of time.