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Backup So Easy Even Your Users Can Do It: Page 18 of 20

Data-transfer rates are published at 6 MBps/write and 9 MBps/read. However, our tests with a 42-MB image file came in at a mere 1.45 MBps/write and a substantial 10-MBps/read, whether we were going from the public partition or from the secure one.

Although pricey compared with devices of similar capacity, the ClipDrive Bio offers good data security, as well as a number of immunities from ESD, RF and voltage-based irregularities. All drives have an integrated pocket clip and port shield, and ship with drivers, a cleaning cloth, a lanyard, a padded belt-clip case and a nifty USB extension/minidocking station.

• ClipDrive Bio, 128-MB version, $145; 2-GB version, $720. Memory Experts International, (888) 422-6726, (514) 333-5010. www.clipdrive.com

The concept of using incremental or differential file-backup schemes to reduce backup times and storage requirements has been around a long time, no doubt because it never made sense to keep storing (and re-storing) the same information.

Unfortunately, regardless of the method used, an entire file was always stored whenever the archive bit called for a backup. As demand grew for remote backups over slower Internet connections, it became evident that we needed further data reductions.