How to add unused space to an existing install
freebsd at edvax.de
Wed Feb 6 18:10:22 UTC 2013
On Wed, 06 Feb 2013 11:58:56 -0600, Paul Schmehl wrote:
> When I try to create a new slice using fdisk, it doesn't seem to work. If
> I move to the label editor, I get this:
> FreeBSD Disklabel Editor
> Disk: mfid0 Partition name: mfid0s1 Free: 0 blocks (0MB)
> Part Mount Size Newfs Part Mount Size Newfs
> ---- ----- ---- ----- ---- ----- ---- -----
> mfid0s1a <none> 2000MB *
> mfid0s1d <none> 65536MB *
> mfid0s1e <none> 4096MB *
> mfid0s1b swap 65536MB SWAP
> mfid0s1f <none> 10240MB *
> mfid0s1g <none> 601GB *
> As you can see mfid0s1g is 601GB, and according to fstab that's /var.
> Yet df -h shows:
> # df -h
> Filesystem Size Used Avail Capacity Mounted on
> /dev/mfid0s1a 1.9G 726M 1.0G 41% /
> devfs 1.0k 1.0k 0B 100% /dev
> /dev/mfid0s1e 3.9G 38M 3.5G 1% /home
> /dev/mfid0s1d 62G 6.6M 57G 0% /tmp
> /dev/mfid0s1f 9.7G 7.5G 1.4G 84% /usr
> /dev/mfid0s1g 582G 39G 496G 7% /var
> So apparently I'm not creating this new slice? It should be /dev/mfid0s1h,
If you're creating a new slice, that would be mfid0s2, because
mfid0s1 is the 1st slice ("DOS primary partition") carrying the
partitions a, swap, d, e, f, g. If I remember correctly, h is
the last partition letter that can be assigned, so this one
should be available.
Problem: The 1st slice mfid0s1 is already of fixed size, so
you cannot add a new partition here without growint that
slice first. Attention, that step isn't free of danger and
should be done with a backup at hand, just in case, and
because you _always_ need a backup. :-)
This problem is not a problem if you create a 2nd slice
mfid0s2 to use it separately.
If you can _really_ create mfid0s2 as a slice, you only need
to format it, e. g. "newfs -U /dev/mfid0s2" which creates
mfid0s2c which in turn is called mfid0s2). You can then assign
that new partition (the one covering the whole slice) to
a new mountpoint, e. g. /data, /stuff or whatever you want.
There are also means to "merge" this partition into some
mountpoint that is already occupied, e. g. /home, maybe via
"mount -o union" including all possibly negative consequences).
> How to I "recapture" the remaining 2+TB of space that's not being used?
Without wiping the whole disk(s)?
Happy FreeBSD user since 4.0
Andra moi ennepe, Mousa, ...
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