Huge Partition

[Jeff Vian]

Rodolfo J. Paiz wrote:

> At 14:44 4/22/2004, you wrote:
>
>>> 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:
>>
>>
>> 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)
>
>
> You'll note that that 1000/1024 is just about 2% short. That should be 
> all you lose to disk naming conventions, but you may lose other space 
> to (as others mentioned) inodes, overhead, etc. So you get to 27.94GB 
> *filesystem size*. But if you add the "used" and "available" numbers 
> from "df -m", do they add to that? Mine don't... they add up to about 
> 5% less than the filesystem size. That's the reserved blocks.
>

BTW,  the difference between 27.94G and the stated 30G size is *exactly* 
the factor of the difference between stating size in billion bytes 
 (30G) (mfgr) and gigbytes (27.94G) (OS).  :-)
1000000000/1073741824 = 0.931322575
30 * 0.931322575 = 27.93967724 == 27.94G ;-)

>