I have downloaded 1.9, and went to refresh my memory on the backup procedure prior to upgrade and have found that the link to the backup documentation in the wiki goes to an empty/missing page.Can someone please reinstate the page? It used to be there...
Appears that they forgot to copy over a link from the old wiki to the new one. I'll let them know. In the interim you can use this guide:
http://www.tmib.net/upgrading-osticket-1812-current-19rc