Nick Lunt wrote:
Hi folks
every now and then I seem to get a flurry of users asking me "why is
'df' inaccurate?".
I've never really understood why though, so anyone know ?
Eg:
$ df -klP /
Filesystem 1024-blocks Used Available
Capacity Mounted on
/dev/mapper/VG00-LVol00 4031680 2204200 1622680 58%
/
$ bc
bc 1.06
Copyright 1991-1994, 1997, 1998, 2000 Free Software Foundation, Inc.
This is free software with ABSOLUTELY NO WARRANTY.
For details type `warranty'.
4031680 - 2204200
1827480
So either df is wrong, I'm blind, or bc can't do take aways ;)
Anyone know why df is wildly inaccurate ?
Ext[234] reserve 5% (by default) of the space for root-only use - see
the '-m' option in the mkfs.ext[234] and tune[24]fs man pages
The difference between 1827480 and 1622680 above is about 5% of 4031680
James Pearson
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