On Wednesday 12 May 2010 09:02:48 Sorin Srbu wrote:
> >However, there is another consideration. When your filesystem was 95%
> > full, did
> >you have some part of the filesystem reserved? When normally creating a
> >filesystem, this is set at 5%, which means "95%" means "95% of the way to
> >hitting the reserved space".
>
> Not quite sure I follow here. The raid-array I created was set to be used
> by BPC only. I didn't reserve anything on these three drives, that I'm
> aware. However BPC is set to use $Conf{DfMaxUsagePct} = 95; as per default
> setting. Is this what you mean?
No, this has nothing to do with BackupPC. This is something you set when you
create the filesystem (or use a GUI partitioner tool). Usually there is a
setting like "reserved blocks" which defaults to 5%. You can also see it with
tune2fs:
# tune2fs -l /dev/sda3
...
Block count: 54193269
Reserved block count: 541932
So this filesystem has 1% of blocks reserved. This is why the percentage in df
does not add up:
# df -h
Filesystem Size Used Avail Use% Mounted on
...
/dev/sda3 204G 18G 184G 9% /home
You can find the real filesystem usage by doing the math yourself (used/size).
Regards,
Tyler
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