Questions about partitioning and ext3

[JEMF]

Somebody has more ideas about this subject?

JEMF escreveu:
> 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?
> 
> 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?
> 
> Thanks.