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Re: df discrepencies



On Mon, May 01, 2006 at 03:30:16PM +0100, Liam O'Toole wrote:
> On Mon, 01 May 2006 09:14:03 -0500
> Kent West <westk@acu.edu> wrote:
> 
> > charlie derr wrote:
> > > On one of the machines that I oversee there is an issue with the df
> > > output that I don't understand.
> > >
> > > here's a part of the output from df -h
> > >
> > > /dev/sda1             440G  420G     0 100% /backup
> > >
> > > if i don't use the -h it looks like this:
> > >
> > > /dev/sda1            461293804 440335112         0 100% /backup
> > >
> > > It appears that there really are 20Gigs free, but that column shows
> > > 0 -- can i reliably ignore that column and use subtraction with the
> > > previous two to compute the true free space?
> > I'm going on very hazy memory here, but it might give you enough info
> > for googling. If I recall correctly, the system wants at least 10%
> > free for "system overhead"; as 20Gig is only about 5% of your 440Gig
> > partition, that's why it's showing as 100% used.
> > 
> > Why rebooting would change this number is beyond me.
> > 
> 
> This would make sense with a journaling filesystem such as ext3.
> Immediately after a reboot the journal is empty.

I would assume that gives diminishing returns as the new writes
further impinge on journal space? I'm thinking your disk is full
charlie :)

A


> 
> -- 
> 
> Liam
> 
> 
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