How can I rescan the scsi-bus in freebsd?

[Eveline]

Hi there,

I'd like to know how to rescan the scsi bus in FreeBSD 4.7. I have an
external scsi harddisk that I only switch on when needed. I would like to
be able to mount the hd as soon as I've switched it on, without having to
reboot my FreeBSD machine.

Thanx in advance.

Greetings,

	Eveline.

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