Date: Sat, 14 Sep 2002 10:37:10 +0100 From: Matthew Seaman <m.seaman@infracaninophile.co.uk> To: Peter Leftwich <Hostmaster@Video2Video.Com> Cc: FreeBSD LIST <FreeBSD-Questions@FreeBSD.ORG> Subject: Re: disklabel -W /dev/ad1 error Message-ID: <20020914093710.GA46500@happy-idiot-talk.infracaninophi> In-Reply-To: <20020913205904.K33339-100000@earl-grey.cloud9.net> References: <20020913205904.K33339-100000@earl-grey.cloud9.net>
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On Fri, Sep 13, 2002 at 09:00:04PM -0400, Peter Leftwich wrote:
> myprompt$ disklabel -W /dev/ad1
> disklabel: ioctl DIOCWLABEL: Operation not supported by device
>
> After the above, these next commands won't work right. Please help
> someone?
disklabel usually operates on a disk slice, rather than a whole disk:
ie.
disklabel -R -r /dev/ad1s1 /tmp/disklabel.out
The only reason to run disklabel against a whole disk is when you want
to create a 'dangerously dedicated' disk. In general, you don't want
to do that: the usual slice/partition setup works very much better, is
supported by every BIOS compatible with FreeBSD and the difference in
usable space is trivially small compared to the size of a modern hard
drive.
To make a second disk bootable, use fdisk(8) and/or boot0cfg(8) ---
the precise combination required depends on how many different OS's
and disk drives you need to have bootable. This section of the
handbook is pertinent:
http://www.freebsd.org/doc/en_US.ISO8859-1/books/handbook/boot-blocks.html
Cheers,
Matthew
--
Dr Matthew J Seaman MA, D.Phil. 26 The Paddocks
Savill Way
Marlow
Tel: +44 1628 476614 Bucks., SL7 1TH UK
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