$ df -h
Filesystem Size Used Avail Use% Mounted on
/dev/mapper/VolGroup00-Backups 425G 377G 27G 94% /Backups
- Size = 425G
- Used = 377G
- Available = 27G
- Used + Available = 404G != 425G
Why is used+available different from total size? This is not happening in any other
server.
I've tried remounting and rebooting the system.
du
shows that the "Used" space in the /Backups
directory from the df
command is correct.
Details:
- Slackware 13.37.0
- Linux 2.6.37.6-smp #1 SMP Sat Apr 9 14:01:14 CDT 2011 i686 Intel(R) Xeon(R) CPU E5530 @ 2.40GHz GenuineIntel GNU/Linux
- HP DL360 G6
Best Answer
This is most likely due to reserved space for the super-user on an ext2/ext3/ext4 filesystem, plus a small rounding error when converting blocks to gigabyte sizes. See this similar discussion.