(Using kernel 2.2.10, i386, Realtek 10Mbs PCI Ethernet,
Samba 2.05a RPM, all RH updates installed at date of
08/01/99)

When using reboot, or halt (or shutdown command) and when a
SMB filesystem is mounted in the system (on another Samba
on another linux, in my case), the initscripts first shut
down network interfaces, and only after, at the end,
unmounts filesystems. Problem: the network interface must
be up to be able to unmount SMB filesystem.
Result: "unmounting filesystems" stays displayed, and the
PC is blocked, it waits forever, it won't unmount /, it
won't halt or reboot.
Solution: scripts should be added/mofied on initscripts
package(or maybe in samba package?) so SMB or other network
filesystems are unmounted before network interface are shut
down.