Huge Partition

[Jeff Vian]

Rodolfo J. Paiz wrote:

> At 16:17 4/21/2004, you wrote:
>
>> Creating the partition with fdisk seems to have improved things. The df
>> utility now reports 1.8T for the partition, the 0.2T being used up in
>> overhead. That's more like it!
>
>
> 200GB in overhead? That's about 10%. Why so high?
>
> Root normally reserves space on a partition to prevent the disk 
> filling up totally and crashing the system, but that's normally just 
> 5%, so where's the other 5% (100GB) going? You can check how much 
> space is "reserved" for root with:

Since physical disk size is specified as 1000 K == 1 G the reported 
filesystem size is less.
In fact 1000/1024 is the factor for every 10e3 factor of disk size.  In 
the case of a 2T range it is a factor of (1000/1024)e3 or about 
0.931322575 * 2T. When rounded to a single decimal this gives a 
filesystem of ~1.8T

With this in mind, how do you figure such a large space consumption for 
overhead?  I interpret that as minimal and normal overhead -- formating 
factors, etc.

In fact, on my 30G physical drive as a single partition it reports a 
filesystem size of 27.94G (a loss of ~7% due to the differences in the 
way it is stated + overhead)

>
> # tune2fs -m /dev/hda1
>
> You can also adjust it to 2% instead of 5% (since your filesystem is 
> so large) via:
>
> # tune2fs -m 2 /dev/hda1
>
> See the man page for more details or if I've made any mistakes.
>
>