Moving some files to another mount point

[Josh Endries]

Hello,

My mail store is almost out of space. I have another disk partition I can use, 
but I'm not sure how to make it available. I'm using 2.2 with virtdomains, so I 
don't think I can move things to another Cyrus partition (no way that I'm aware 
of). I can't seem to rename a mailbox...

Is it possible to mount another partition (e.g. ad0s1d) within my 
/var/spool/imap hierarchy (e.g. mount another it as 
/var/spool/imap/domain/blah.com)? Would that cause all sorts of problems? I 
don't know if Cyrus uses fs-specific things, like inodes or anything, that would 
cause conflicts...

Thank you!

J