NAME

backup − interactive backup program for SGI IRIS workstation

SYNOPSIS

/etc/backup

DESCRIPTION

Backup is an interactive backup program designed for use on the Silicon Graphics IRIS workstation.  Backup will determine whether a full backup has been done in the past week.  If it has not been done backup will prompt the operator to mount cartridge tapes to backup both the root and /usr file systems.  If a full backup has been done within the last week backup will prompt the operator to mount a cartridge tape to do an incremental backup of the entire file system (both root and /usr). 

Backup uses one tape for doing incremental backups on Mondays, Wednesdays, and Fridays and a different tape for doing incremental backups on Tuesdays and Thursdays.  It also alternates between two sets of tapes for doing full backups on alternate weeks.  This causes backup versions to exist longer and also handles the case where the disk fails in the middle of a backup in which case the backup being made is incomplete. 

Backup uses tar to do the backups with relative pathnames relative to either / or /usr.  Backup also keeps a log of backups in the file /etc/back.log which is written to backup tapes as the first file and named back.log.  Backup is designed to handle systems with two file systems, root and /usr.  Other configurations require modifications to backup.

FILES

/etc/back.loglog of backups
/etc/backfull.lasttime of last full backup
/etc/backincrO.lasttime of last Monday/Wednesday/Friday backup
/etc/backincrE.lasttime of last Tuesday/Thursday backup
/tmp/back?*temporaries

SEE ALSO

tar(1), cpio(1). 

Version 2.4  —  May 08, 1986