User home directories on the central file server are backed-up on daily basis. The daily incremental backup is taken and kept for a week.
On first Sunday of every calendar month, all files are saved on tapes. This backup is retained for one year. On other Sundays of the month a weekly backup is taken which is retained for a month. From Monday to Saturday, incremental backup is taken which is recycled in the next week.
Files created or modified in last 24 hours (one day) and retained in the area, are saved on backup tape in early hours of the day, and are retained in backup for a week. Files created or modified in last one week (Sunday to Saturday of last week) and retained in the area, are saved on backup tape on Sunday in early hours, and are retained in backup for a month. All files in every user's area, on first Sunday of the month, are saved on backup tape, and are retained in backup for one year.
A user can request for restore of the files available on backup tapes. User should e-mail to "email@example.com" giving full path names of files/directories to be restored. User can also put request on paper and submit to Computer Center.