[nflug] Missing Free Space

[Justin Bennett]

ok, I'll play around. Thanks for the info.

Justin Bennett
Network Administrator
Dynabrade, Inc.
8989 Sheridan Dr.
Clarence, NY 14031
 



On 1/21/2006 1:30 PM, David J. Andruczyk wrote:

>--- Justin Bennett <Justin.Bennett at Dynabrade.com> wrote:
>
>  
>
>>This may have been touched on before, but please refresh my memory. I
>>
>>have a partition that's about 45GB. It's using 42GB according to 'df'
>>
>>that should leave about 3GB free. It only shows 700MB free.  What
>>causes 
>>this, any way to reclaim the 'missing' space. Or is df just not 
>>reporting it correctly.
>>
>>/dev/sdb1             45358500  42311596    742784  99% /export/home
>>
>>    
>>
>
>
>Depending on the filesystem used on that disk there are varying amounts
>of overhead. (journal, metadata, indexes) as well as space used by
>inodes and superblocks.  Some mkfs options for certain filesystems let
>you tune the number of inodes to allow more free space (EXT3 does for
>sure).  Other things you may wish to check is the root reserved amount,
>a.k.a reserved_blocks_count (viewable/settable with tune2fs for EXT2/3
>FS's)
>
>Since it seems that you're missing about 2.3 GB, that's about 5% of the
>filesystem.  EXT2/3 by default reserves 5% for root.  
>
>from the man.ext2 man page.
>
> -m reserved-blocks-percentage
>Specify the percentage of the filesystem blocks reserved for the
>super-user.   This  avoids  fragmentation, and allows root-owned
>daemons, such as syslogd(8), to continue to  function  correctly after
>non-privileged processes are prevented from writing to the filesystem. 
>The default percentage is 5%.
>
>
>
>
>
>Dave J. Andruczyk
>
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