1 BACKUPS 
Full backups are made of the user disks on a daily basis. Backup tapes
are retained for six months, then recycled.  This is done only for the
purpose of emergency recovery of lost files, and does not replace the
normal users' archiving of files which should be performed. The VMS
BACKUP utility may be used to easily and reliably archive files or
entire directories to tape, and to restore desired files or directories.

Users wishing to restore one or more files from the system backup tapes
should send MAIL to SYSTEM, telling the full name of the file or files to
be restored, when the file last existed on disk, and the circumstances
of the file loss . 
