The success of a 24x7 electronic reserves service requires a well configured and robustly managed system. Based upon a five-year successful experience of supporting Docutek’s ERes system at Saint Louis University, this paper discusses and examines the technical issues affecting the proper operation of the system. Areas covered include selecting an adequate server and scanner; proper server management; reducing PDF file size using various Acrobat 6 features; and interoperability between ERes and other systems.