Hi Dave,
On 1/9/07, Dave Shield <[EMAIL PROTECTED]> wrote:
> On 09/01/07, Deon van der Merwe <[EMAIL PROTECTED]> wrote:
> > According to net-snmp disk usage percentage is: 78.20%
> > Different than df, but df is also strange...
> > [EMAIL PROTECTED] df -B4096
> > Filesystem 4K-blocks Used Available Use% Mounted on
> > /dev/sda3 8517017 6661036 1423331 83% /
> >
> > Again it reports 83% use, but if you do the calculation yourself you
> > get: 78.20% which is the same as net-snmp... but what about this 83%
> > then?
>
> Traditionally, Unix filesystems have reserved a small percentage of the
> disk for "root-only" activity. This is therefore not available for general
> use.
> You'll note that User+Available = 8084367, which is not the same as the
> total size.
> 6661036/8084367 = 82.3%
Thanks for the pointer in the right direction. The confirmation is in
the documentation:
================
man mke2fs
...
-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%.
...
================
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