Lazy unmounts during shutdown?

[Ian Pilcher <i pilcher comcast net>]

I've been having an occasional problem with umount hanging during
shutdown.  It's particularly annoying because it means all of my
software RAID devices have to resync when I reboot.

Anyway, I came across the lazy unmount option in the umount man page,
and I've added "-l" to the problematic umount call in
/etc/rc.d/init.d/halt.  The jury's still out, but I haven't seen any
hangs so far.

My question:  Is there any reason *not* to use lazy unmounting during
shutdown?

Thanks!

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Ian Pilcher                                        i pilcher comcast net
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