HDD free space

[Jeremy Chadwick]

On Mon, Jul 21, 2008 at 12:44:07PM +0300, ??????? ??????? wrote:
> My problem:
> 
> Filesystem     Size    Used   Avail Capacity  Mounted on
> /dev/ad6s1a     16G     13G    1.3G    91%    /
> devfs          1.0k    1.0k      0B   100%    /dev
> /dev/ad5s1d    727G    601G     68G    90%    /usr/home/reliz
> /dev/ad4s1d    484G    484G    -39G   109%    /usr/home/reliz/hdd6
> /dev/ad6s1d    468G    435G   -5.1G   101%    /usr/home/reliz/hdd2
> /dev/ad7s1d    387G    362G   -5.9G   102%    /usr/home/reliz/hdd5
> /dev/ad0s1d    242G    223G   -752k   100%    /usr/home/reliz/hdd4
> 
> line "/dev/ad4s1d    484G    484G    -39G   109%
> /usr/home/reliz/hdd6" why "-39G"? how can I get correct avail space?!

This is often caused by either 1) softupdates, 2) minfree for root, or
3) some kind of filesystem corruption.

You won't be able to do anything about the softupdates ordeal; running
sync and waiting a few minutes (sometimes 3-4 minutes depending upon the
size of data which is changing).  You can use gstat to see what's going
on behind the scenes I/O-wise.

minfree you can tune via tunefs(8).

Filesystem corruption should be dealt with by booting into single user
and running fsck manually.  Yes, I know FreeBSD has background fsck, but
it's recently been explained to me that there are major caveats and
issues with it.  You can disable it in multiuser by using
background_fsck="no" in /etc/rc.conf.

-- 
| 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 |