From owner-freebsd-questions@FreeBSD.ORG  Fri Jan 27 20:02:36 2006
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Date: Fri, 27 Jan 2006 22:02:08 +0200
From: Giorgos Keramidas <keramida@ceid.upatras.gr>
To: "Tamouh H." <hakmi@rogers.com>
Message-ID: <20060127200208.GA1094@flame.pc>
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Cc: 'FreeBSD' <freebsd-questions@freebsd.org>
Subject: Re: adding unused disk space
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On 2006-01-27 14:39, "Tamouh H." <hakmi@rogers.com> wrote:
>
> Hi,
>
> When trying to add a new partition to an already existing disk slice
> on FreeBSD 5.4, are these the proper procedures to follow:
>
> lets say we have:
>
> /dev/ad4s1a    507630   56104   410916    12%    /
> devfs               1       1        0   100%    /dev
> /dev/ad4s1d    507630      12   467008     0%    /tmp
> /dev/ad4s1e  10154158 1833920  7507906    20%    /usr
> /dev/ad4s1f   6090094   40804  5562084     1%    /var
>
> There is some 20GB unused space on the drive and I want to use that for /backup, so I did:
>
> 1) sysctl kern.geom.debugflags=16
>
> 2) sysinstall -> Confgiure -> Disk Label -> ad4
>
> 3) I've mounted each ad4 to its proper place using 'M'
>
> 4) then I created the partition /backup using 'C' from the unused space which wass assigned /dev/ad4sa1g
>
> 5) then used 'W' to write the partitions, it gave couple of errors about busy devices..etc
>
> 6) reset sysctl:  sysctl kern.geom.debugflags=0
>
> 7) rebooted the machine and it came back fine
>
> 8) edit /etc/fstab and add
> /dev/ad4s1g		/backup	ufs	rw	2	2
>
> 9) reboot the machine and it fails to come back on
>
> am I missing something ?

Yes.  Between steps (8) and (9) you should have created a filesystem on
that device:

        # newfs /dev/ad4s1g

Then you can mount it as usual:

	# mount /backup