ext2 filesystem superblock

Hi all,

I'm working on understanding filesystems and thought I'd start with the ext2 filesystem (since I have an image of that lying around).
I wrote a little test program to scan the superblock of a 10mb linux hd image.

The documentation for ext2 filesystem state that the 'blocks' and 'inodes' are equally divided among the 'groups'

Here is the data I get from the image file:

Loading 'linux.img'
 Total inodes            2560
 Total blocks            10240
 Reserved blocks         0
 Free blocks             872
 Block size              1024
 Fragment size           1024
 Blocks/group            8192
 Fragments/group         8192
 Inodes/group            1280
 Last time mounted       3FB1_0F81
 Last time written       4209_3E84
 Last time checked       3FB1_0F43
 Time allowed for checks 00ED_4E00
 Times mounted           99
 Max mounts till check   37
 Filesystem state        0000
 Error state              None
 Minor revision          0000
 Revision Level           V2 Dynamic
 Host OS                  Linux
 Volume ID               E978_03C2_D56E_0D9F_3246_0834_1D38_73AC
 Volume Name
 Directory last mounted

All of the information seems to make sence except for the blocks/group
I get 8192 blocks per group but only 10240 total blocks. The documentation doesn't state it, is it normal for the last group on the partition to have a partial share of the blocks? Or does this mean that
there is only one group and the last 2048 blocks of the disk are not used? Or maybe something altoghter different...

--
[kain]
http://www.geocities.com/kahlinor
.