It may be important to provide long-term preservation of digital data
even when that data is stored in an unreliable system, such as a
filesystem, a legacy database, or even the World Wide Web.  In this
research paper we focus on the problem of archiving the contents of a
web site without disrupting users who maintain the site. We propose an
archival storage system, the InfoMonitor, in which a reliable archive
is integrated with an unmodified existing store. Implementing such a
system presents various challenges related to the mismatch of features
between the components, such as differences in naming and data
manipulation operations. We examine each of these issues as well as
solutions for the conflicts that arise. We also discuss our experience
using the InfoMonitor to archive the Stanford Database Group's web
site.