The Tests We attempted to back up file-server data that closely represented a real-world mix of environments. This included a significant number of files that exceeded the 100K size of typical Microsoft Word or Excel files. The largest files in our tests were 133MB.Our first test involved simple data backup (with performance efficiency measured in several ways), and our second measured data restore speeds, representing each units ability to find specific data on the tape and then write it back to disk. The restore test used data that was not located sequentially on the tape; thus it required tape forward and seek operations. We restored 97 files in 18 directories, totaling 157,187,873 bytes (just over 157MB). For the automated devices only, we ran an additional test, which recorded how fast each one could inventory four preloaded tapes. This required each unit to load every cartridge into the drive and read its label.
To prepare our backup server for testing, we did a clean installation of Microsoft Windows 2000 Server, which included Veritas Backup Exec. We wrote this setup to an image file using Symantec Ghost Corporate Edition 7.0 and then loaded it before installing each new tape device. We also added a verify pass, and we chose settings that would minimize the amount of data logging.