It was really surprise for me, Today is my first day working with FreeBSD after 11 years linux administration 🙂
ms3# df -h
Filesystem Size Used Avail Capacity Mounted on
/dev/mfid0s1a 29G 5.9G 21G 22% /
devfs 1.0K 1.0K 0B 100% /dev
/dev/mfid0s1f 213G 9.9G 186G 5% /hast
/dev/mfid0s1d 2.9G 2.7M 2.7G 0% /tmp
/dev/mfid0s1g 97G 77G 12G 86% /usr/local
/dev/mfid0s1e 29G 1.1G 26G 4% /var
/dev/mfid1s1d 451G 421G -6.8G 102% /opt1
linprocfs 4.0K 4.0K 0B 100% /usr/compat/linux/proc
ms3#
Filesystem Size Used Avail Capacity Mounted on
/dev/mfid0s1a 29G 5.9G 21G 22% /
devfs 1.0K 1.0K 0B 100% /dev
/dev/mfid0s1f 213G 9.9G 186G 5% /hast
/dev/mfid0s1d 2.9G 2.7M 2.7G 0% /tmp
/dev/mfid0s1g 97G 77G 12G 86% /usr/local
/dev/mfid0s1e 29G 1.1G 26G 4% /var
/dev/mfid1s1d 451G 421G -6.8G 102% /opt1
linprocfs 4.0K 4.0K 0B 100% /usr/compat/linux/proc
ms3#
It`s o.k. it means, that I just using reserved space. (available for root, n/a for users.)
man tunefs
-m minfree
Specify the percentage of space held back from normal users; the
minimum free space threshold. The default value used is 8%.
Note that lowering the threshold can adversely affect perfor-
mance:
o Settings of 5% and less force space optimization to always be
used which will greatly increase the overhead for file
writes.
o The file system's ability to avoid fragmentation will be
reduced when the total free space, including the reserve,
drops below 15%. As free space approaches zero, throughput
can degrade by up to a factor of three over the performance
obtained at a 10% threshold.
If the value is raised above the current usage level, users will
be unable to allocate files until enough files have been deleted
to get under the higher threshold
Specify the percentage of space held back from normal users; the
minimum free space threshold. The default value used is 8%.
Note that lowering the threshold can adversely affect perfor-
mance:
o Settings of 5% and less force space optimization to always be
used which will greatly increase the overhead for file
writes.
o The file system's ability to avoid fragmentation will be
reduced when the total free space, including the reserve,
drops below 15%. As free space approaches zero, throughput
can degrade by up to a factor of three over the performance
obtained at a 10% threshold.
If the value is raised above the current usage level, users will
be unable to allocate files until enough files have been deleted
to get under the higher threshold
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