Improper shutdown of system / Fragmentation Problems / Boot logs

[Robert Storey]

> I am kinda new to FBSD, still kinda learning stuff. Anyway, when my
> system boots i see all kinda fragmentation information. How do I
> correct this? Any good reading material? 

FreeBSD will defragment itself without any action from the user.
However, defragmentation requires some blank space, and (ideally) you
should not let any partition get more than 80% full. You can check on
that with "df -h":

bob at sonic:~> df -h
Filesystem    Size   Used  Avail Capacity  Mounted on
/dev/ad0s2a   248M    68M   160M    30%    /
devfs         1.0K   1.0K     0B   100%    /dev
/dev/ad0s2g   2.4G   281M   1.9G    13%    /home
/dev/ad0s2e   248M   1.2M   227M     1%    /tmp
/dev/ad0s2f   8.7G   2.4G   5.6G    30%    /usr
/dev/ad0s2d   248M    17M   211M     8%    /var

The column labeled "Capacity" tells you the percentage of space being
consumed - over 80% would be bad. Note that the "devfs" uses 100% (on
FBSD 5.x, it doesn't exist on 4.x) - that's no problem, it's not a
partition and it will always be 100%.

regards,
Robert