freebsd 5.3 have any problem with vinum ?

[Oliver Torres Delgado]

I have freebsd 5.3 rc1 installed perfectly, i configure vinum with the handbook and all work perfect
but when try run vinum with rc.conf there display the error:

panic: unmount: dangling vnode
cpuid: 0
uptime= 4s
Cannot dump. No dump device defined
Automatic reboot in 15 seconds.

why happened ? I configure freebsd 4.x with this config and work perfectly :(

thx to alls.