Can anyone help make sense of this? This is an ext3 partition. It's
only showing 403GB out of 426GB used, but then it says only 632MB
available? Where'd the extra ~25GB go?
[scarolan@server]$ df -H /disks/vrac5
Filesystem Size Used Avail Use% Mounted on
/dev/sdb2 426GB 403GB 632MB 100% /disks/vrac5
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07-23-2008, 01:09 PM
Ralph Angenendt
df command reports inaccurate results?
Sean Carolan wrote:
> Can anyone help make sense of this? This is an ext3 partition. It's
> only showing 403GB out of 426GB used, but then it says only 632MB
> available? Where'd the extra ~25GB go?
Those are the ~ 5% which are automatically reserved for root ...
man tune2fs
Ralph
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07-23-2008, 01:26 PM
"William L. Maltby"
df command reports inaccurate results?
On Wed, 2008-07-23 at 15:09 +0200, Ralph Angenendt wrote:
> Sean Carolan wrote:
> > Can anyone help make sense of this? This is an ext3 partition. It's
> > only showing 403GB out of 426GB used, but then it says only 632MB
> > available? Where'd the extra ~25GB go?
>
> Those are the ~ 5% which are automatically reserved for root ...
>
> man tune2fs
Further, there is some overhead for i-nodes and what not. I don't recall
if that is included or excluded in/from the df calculations.
A "df -i" will likely show a *very* large number of available i-nodes
and a small percent used. I've many times made a file system and reduced
the number of i-nodes substantially and gained a *lot* of space. Due
diligence is required: the profile of number of files, average files
sizes, temporary files during busiest parts of the day, ... must be
taken into consideration to derive a "safe" usable number. Get wrong and
you'll need some aspirin for the headache.
Also, when making the file system, reducing the amount reserved for root
is usually safe on today's larger drives, especially on a relatively
stable system/user base/file/system usage.
>
> Ralph
> <snip sig stuff>
--
Bill
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07-23-2008, 02:31 PM
Kai Schaetzl
df command reports inaccurate results?
William L. Maltby wrote on Wed, 23 Jul 2008 09:26:21 -0400:
> Also, when making the file system, reducing the amount reserved for root
> is usually safe on today's larger drives, especially on a relatively
> stable system/user base/file/system usage.
I gather this can't be done after creation?
Kai
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07-23-2008, 02:38 PM
Jens Larsson
df command reports inaccurate results?
> > Also, when making the file system, reducing the amount reserved for
> > root is usually safe on today's larger drives, especially on a
> > relatively stable system/user base/file/system usage.
> I gather this can't be done after creation?
> Kai
Remember: You can tune a file system, but you can't tune a fish.
On Wed, 2008-07-23 at 16:31 +0200, Kai Schaetzl wrote:
> William L. Maltby wrote on Wed, 23 Jul 2008 09:26:21 -0400:
>
> > Also, when making the file system, reducing the amount reserved for root
> > is usually safe on today's larger drives, especially on a relatively
> > stable system/user base/file/system usage.
>
> I gather this can't be done after creation?
Yes it can be adjusted. But since I used to do so much of this sort of
thing, it became second nature to do it at file creation time. "Man
tune2fs" has the details for adjusting by percentage or block count.
>
> Kai
>
--
Bill
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07-23-2008, 03:02 PM
"William L. Maltby"
df command reports inaccurate results?
On Wed, 2008-07-23 at 16:38 +0200, Jens Larsson wrote:
> > > Also, when making the file system, reducing the amount reserved for
> > > root is usually safe on today's larger drives, especially on a
> > > relatively stable system/user base/file/system usage.
>
> > I gather this can't be done after creation?
> > Kai
>
> Remember: You can tune a file system, but you can't tune a fish.
Hootie and the Blowfish? They can be tuned! ;-)
>
> % man tune2fs
>
> The "-m" option.
or the -r option.
>
> /jens
>
> --
> <snip sig stuff>
--
Bill
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07-23-2008, 03:31 PM
Kai Schaetzl
df command reports inaccurate results?
William L. Maltby wrote on Wed, 23 Jul 2008 10:59:05 -0400:
> Yes it can be adjusted. But since I used to do so much of this sort of
> thing, it became second nature to do it at file creation time. "Man
> tune2fs" has the details for adjusting by percentage or block count.
Great, thanks. Just in case I need it one day :-)
Kai
--
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07-23-2008, 03:50 PM
Ralph Angenendt
df command reports inaccurate results?
Kai Schaetzl wrote:
> William L. Maltby wrote on Wed, 23 Jul 2008 09:26:21 -0400:
>
> > Also, when making the file system, reducing the amount reserved for root
> > is usually safe on today's larger drives, especially on a relatively
> > stable system/user base/file/system usage.
>
> I gather this can't be done after creation?
That's why I said "man tune2fs" >
Yes, it can.
Cheers,
Ralph
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df command reports inaccurate results?
