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Date:      Sun, 5 Oct 2008 09:16:37 -0400
From:      Jerry McAllister <jerrymc@msu.edu>
To:        Jeremy Chadwick <koitsu@freebsd.org>
Cc:        Wojciech Puchar <wojtek@wojtek.tensor.gdynia.pl>, 'Alexandre Biancalana' <biancalana@gmail.com>, freebsd-questions@freebsd.org, Don O'Neil <lists@lizardhill.com>
Subject:   Re: Can't add new 1TB disk in FreeBSD 6.1
Message-ID:  <20081005131637.GA65736@gizmo.acns.msu.edu>
In-Reply-To: <20081005104253.GB82084@icarus.home.lan>
References:  <D3314319D28D4C51B1D721DFFE21F942@mickey> <gc7s7u$kba$1@ger.gmane.org> <20081004181923.N2683@wojtek.tensor.gdynia.pl> <4A5E18EB2ED142C2B97EFD5A82AA805F@mickey> <8e10486b0810041351je5262fbi3bee00f47ef3bc68@mail.gmail.com> <10435563D3EC45D8A9AE00AECF113945@mickey> <20081005110745.T5124@wojtek.tensor.gdynia.pl> <20081005104253.GB82084@icarus.home.lan>

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On Sun, Oct 05, 2008 at 03:42:53AM -0700, Jeremy Chadwick wrote:

> On Sun, Oct 05, 2008 at 11:07:58AM +0200, Wojciech Puchar wrote:
> >>>
> >>>
> >>> I tried using fdisk first, same problem, won't let me write to the disk.
> >>
> >> Do you will use the entire disk in one partition ? If so, just do:
> >> newfs /dev/ad4
> >>
> > yes you can. i actually do this
> 
> Isn't this what's called "Dangerously Dedicated" mode, and is considered
> "very risky behaviour" on FreeBSD nowadays?

It is what is called 'dangerously dedicated'  but the 'nowdays' thing is
not relevant.   It is as old as the slice/partition framework.  It is
probably not a good name for it because it is not risky for the system
you are using it on.    It's only problem is if you want to read/write
the disk in a different system.  You might not be able to do it because
it does not follow the most standard way.    It is not a problem for a disk
that is only used on FreeBSD.

On the other hand, I see no reason to not use the slice+partition system
that is most standard.   fdisk to create slices and bsdlabel to create
partitions and then newfs each partition except swap.

////jerry

> 
> I would be wary of doing it that way.  Using slices is the preferred
> method, e.g. newfs /dev/ad4s1a.
> 
> -- 
> | Jeremy Chadwick                                jdc at parodius.com |
> | Parodius Networking                       http://www.parodius.com/ |
> | UNIX Systems Administrator                  Mountain View, CA, USA |
> | Making life hard for others since 1977.              PGP: 4BD6C0CB |
> 
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