Disk space used on empty partition?

[uhcafigdc]

The partition is formatted to ext3, starting with block 1 on the drive.
The mount point for /dev/sdc1 lists 0 files when doing `ls -A`
`df -h` shows that the partition has 92MB used.

How is this space being used, and how can I free it up?

edit: I guess this isn't a newbie question. Could someone move this?

[raghaven.kumar]

what does 'fdisk -l' show?
Maybe, you created a extended partition which does not show in df -h.

[vickey_20]

please post the out put of fdisk -l

[uhcafigdc]

There are several more devices on this computer, but these are associated with this particular drive. This machine was set up by someone other than myself.

[root@files /]# /sbin/fdisk -l

Disk /dev/sdc: 250.0 GB, 250059350016 bytes
255 heads, 63 sectors/track, 30401 cylinders
Units = cylinders of 16065 * 512 = 8225280 bytes

   Device Boot      Start         End      Blocks   Id  System
/dev/sdc1   *           1       30371   243955026   83  Linux
/dev/sdc2           30372       30386      120487+  83  Linux
/dev/sdc3           30387       30401      120487+  82  Linux swap

[vickey_20]

ok please post the output of where you see the size used

df -h

[uhcafigdc]

[root@files /]# df -h
Filesystem            Size  Used Avail Use% Mounted on
/dev/sdc1             230G   92M  218G   1% /mnt/backup

[root@files /]# ls -A /mnt/backup
[root@files /]#

Additionally, 230G - 92M != 218G. How does this work?

[HROAdmin26]

Google - ext3 filesystem overhead

Let's summarize total ext3 file system overhead.

Total default ext3 file system overhead = number of block groups with superblocks * ( Super block + Group descriptors + Reserved GDT blocks + Data Block bitmap + Inode bitmap + Inodes table ) + number of block groups without superblocks * ( Data Block bitmap + Inode bitmap + Inodes table ).

In my case this equals 3859055 blocks or ~ 14.6 Gibibytes

[uhcafigdc]

Thanks HROAdmin26