Re: Questions about partitioning and ext3

[Matthew Dawson <matthewjd@gmail.com>]

On January 5, 2006 05:02 am, JEMF wrote:
> Hello all!
>
> I have a 512 MB Kingston flash disk. When I try to create a partition
> with 460 MB (471.040 KB), the partition is created with 460.6 MB
> (471.665 KB).
>
> ------------------------------------------------
>    Device Boot      Start         End      Blocks   Id  System
> /dev/sdb1               1         951      471665   83  Linux
> ------------------------------------------------
>
> Why? Geometry?
Probably, Disks can't always give an exact size, so that would be my bet.
>
> 2nd Question:
>
> When I format the partition with ext3, the df -k command returns:
>
> ------------------------------------------------
> Filesystem           1K-blocks      Used  Available Use%  Mounted on
> /dev/sdb1               456730       8239    424908   2%    /mnt
> ------------------------------------------------
>
> I think 8239 KB (8.05 MB) was used by journal. But the amount of  blocks
> decreased after formatted (471665 to 456730). Why?
Well, the number of blocks was probably taken by ext3 stuff, but I am not 
sure.  As well, by default ext3 sets aside 5% (i think) to the root user, but 
the can be changed with tune2fs.
>
> I use Sarge.
>
> Thanks.
Np.