> 
> **Possible Duplicate:**  
> 
> [ext4 partition size / free space discrepancies](https://askubuntu.com/questions/48488/ext4-partition-size-free-space-discrepancies) 
> 
> 
> 

The results from a df on my main drive on my server don't add up. I came close to running out of disk space, I freed 4 gigs a couple of days ago, but we're still getting weird results two days later.

```
Filesystem           1K-blocks      Used Available Use% Mounted on
/dev/sda1             78441416  73732352    724536 100% /

```

Now, by my calculation, 78,441,416 - 73,732,352 = 4,709,064, so there should be over 4 gigs left, not the 724,536K that df is reporting.

I don't see this could be a quota error - though `quota -f` apparently isn't an option for Ubuntu and I haven't yet found a command to recompute the quota.

I'm now going through the various directories doing a `du -sk` (glad the server seems to have light traffic for a Monday morning) but not sure what that will tell me.

Any hints?