Backups of the main Faculty servers are carried out by maintaining a mirror of each filesystem and saving incremental changes overnight on the mirror server. The QStar software directory as well as the entire filesystem are replicated on the mirror server at ‘petal-backup-01’ under the ‘export/mirror’ directory. The filesystem is replicated under the ‘petal-fs-01_root’ directory while the incremental changes are stored under ‘increment’ .