Data Recovery Article
Seven ways to minimize tape failure
By Doug Owens
Tape backup is still the most frequently used
backup method for business users because of its
cost-effectiveness per megabyte of data, despite
the increasing popularity of recordable CDs and
DVDs. However, just like any technology, tape
drives, backup tapes and tape backup software
There are ways to minimize the chances of a tape backup's failing in the first
place. Here are a few tips:
Verify your backups. Most backup software will automatically do a quick
"read-after-write" verification and will offer optional full verification. The latter
is both more thorough and more time-consuming, roughly doubling the
backup time, but if your files are crucial, it makes sense to do a full
Store one backup tape off site. This will ensure your files are preserved if
your site experiences a fire, flood or other disaster. Some companies swap
backup tapes with other offices. With some smaller businesses, it often
makes sense for one employee to take the backup tape home with him. Another option is using an off-site storage firm that provides fireprotected
storage facilities for print and digital media as well as tape.
Store your tapes properly. With backup tapes on site, keep them stored in a stable environment, without extreme temperatures, humidity or
electromagnetism. Do not, for instance, store the tapes in a safe on the opposite side of the wall from a large generator, whose electrical fields
can wreck havoc with the data on them.
Rotate tapes. Use more than one backup tape. Instead of using the same tape time after time, rotate through multiple tapes. You can use any
of a number of different systems for this. With the odd/even system, you use one tape on one day, a second tape the next day, reuse the first
tape on day three, and so on. With the five-day rotation system, you use a different tape for each day of the workweek.
Track the "expiry date." Backup tapes are typically rated to be used from 5,000 to 500,000 times, depending on the type of tape. Tape
backup software typically will keep track of the tapes, regardless of the rotation system.
Maintain your equipment. Clean your tape backup drive periodically, following directions in its manual regarding frequency. Consider having
an authorized maintenance person from the manufacturer of the tape backup drive or from a third-party repair firm check the alignment of the
drive every 12 to 18 months. Most businesses just send the drive back to the manufacturer when it begins to have problems, but if a drive has
problems, so can the backup tapes.
Do regular checkups. Periodically test the backup tapes and restore procedures. You can, for instance, restore the data on them to a different
server or to a different partition or folder on the same server where the original information is stored.
At the end of the day, never assume your back up technology will never fail. It's just as prone to failure as any other technology. Proper
maintenance and testing of your tape technology will mean when threats outside your control jeopardize your data, you can turn to your back
ups with confidence and get your business running again smoothly.