Groupwise 7 Documentation:
http://www.novell.com/documentation/gw7/gw7_admin/index.html?page=/documentation/gw7/gw7_admin/data/bqpw8ct.html
A link to a cool solutions article for adding dbcopy script to te crontab:
http://www.novell.com/communities/node/2611/incremental-groupwise-database-backups
A Novell forum post on dbcopy I found helpful:
http://forums.novell.com/novell-product-support-forums/groupwise/groupwise-7x/gw7-install-setup-admin/108420-dbcopy-cron-oes-linux.html#post443320