[SOLVED] df reports 100% full yet 18Gb free?

TonyAR · 04-19-2010, 08:01 AM

Hello,

I have a server running CentOS 5.3 (Final)

Kernel version is:

2.6.18-128.el5 #1 SMP Wed Jan 21 10:44:23 EST 2009 i686 athlon i386 GNU/Linux

The output from df -h is as follows:

Filesystem Size Used Avail Use% Mounted on
/dev/sda2 9.5G 3.7G 5.4G 41% /
/dev/sda5 4.6G 456M 3.9G 11% /var
/dev/sda6 343G 325G 902M 100% /home
/dev/sda1 99M 12M 83M 12% /boot
tmpfs 506M 0 506M 0% /dev/shm

As you can see, /home claims to be 100% full - but yet there is actually 18Gb free?

I seem to recall this could be something to do with running out of inode space?

Can anybody offer any help please?

Thanks in advance,
Tony.

troop · 04-19-2010, 08:06 AM

ext2/3/4 by default reserves 5% of the space for the root. You can change that by tune2fs.

TonyAR · 04-19-2010, 08:55 AM

Quote:

Originally Posted by troop

ext2/3/4 by default reserves 5% of the space for the root. You can change that by tune2fs.

That's sorted - thanks for your help!

tune2fs -m 1 /dev/sda6
tune2fs 1.39 (29-May-2006)
Setting reserved blocks percentage to 1% (927974 blocks)
[root@nas ~]# df -h
Filesystem Size Used Avail Use% Mounted on
/dev/sda2 9.5G 3.7G 5.4G 41% /
/dev/sda5 4.6G 456M 3.9G 11% /var
/dev/sda6 343G 325G 16G 96% /home
/dev/sda1 99M 12M 83M 12% /boot
tmpfs 506M 0 506M 0% /dev/shm

tredegar · 04-19-2010, 12:28 PM

It is OK to set /home to have zero reserved blocks, because root's home is on / so root can always login (so long as you are not running one of the 'buntus, and have not allocated root its own password).

You do need 1-5% (depends on how large your / partition is) reserved space on /