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Date: Sun, 22 Jun 2008 08:49:28 +0200 (CEST)
From: Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>
To: Helge Rohde <heroh@gmx.de>
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Cc: freebsd-questions@freebsd.org
Subject: Re: shellscript conditional to check for external disk
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> Hello List,
>
> I need to write a backup script, and one of the required actions would be a
> copy of the backup to an external firewire drive. I would like to make this
> as easy as possible for the local staff, so i'd like to check whether the
> drive is attached, if necessary mount it, copy over the backup  and unmount
> it again, so that the local staff can swap the external disks when they're
> not used.
>
> Is there a canonical way to achieve what i want? I played with the idea of
> simply checking for /dev/da0s1d's existance, but that won't disappear on
> disconnect,

won't disappear on disconnect? strange.


you may add something to devd.conf - so your script will be started on 
attach.