One possibility is to add your own udev rule for this partition, that overrides the default ones. On Ubuntu 10.04 `/lib/udev/rules.d/80-udisks.rules` has some default rules that make udisks ignore some partitions (e.g. partitions that are known to be rescue partitions etc.) which might be an inspiration...

On Ubuntu 10.04 your own rules should go into `/etc/udev/rules.d/` (see the README there).

On another distro those things might be located differently, but the basics should be the same...