Ext4 effectively does a block-level wipe when you do a delete. (Makes
forensics difficult.)  Odds are that your "rm" command has removed the
file pointers, but the kernel has not yet completed scrubbing the
disk.  I would expect the space to become free once that process is
done.

-Josh More


On Mon, May 21, 2012 at 3:38 PM, Mr. B-o-B <mr.chew.baka at gmail.com> wrote:
> I have a WTF in progress, and I can't figure out why.  I have a CentOS box
> that I use to store various backups on at work.  All the backups are stored
> on a separate RAID 6 setup (11TB - LVM using ext4).  The backups area is
> shared via Samba.
>
> So I just rm a directory that was close to 6TB is size.  However when I do a
>    df -h   to disk usage remains unchanged.
>
> I thought Samba might have something to do with this, so I restarted the
> service.  No Change.  I rebooted the box and no change.
>
> Has anyone experienced this before, and if so how did you reclaim the space?
>
> Any thoughts on this would be greatly appreciated.
>
> Thanks!
>
> Bob
>
>
>
>
>
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