fou4s on vservers

We use fou4s on vserver systems: there is the master system where
fou4s works just fine. The problem arises with base system for the
virtual servers: It is a read-only /map-partition. A fou4s run will
only work when the partition is remounted read-write. We would like
to use an automatic nightly check on the read-only mounted partition.

I can think of two possible ways of getting this done:

1. use the writeable /-area while only checking the RPM database of
   the readonly /map environment.

2. chroot /map completely and use something like
   chroot /map fou4s --auto --nodownload --nocache --nocache

I cannot get either of these working. Any recommendations?

Kevin
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   _             |  Kevin Ivory          |  Tel: +49-551-3700000
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