Here is the partition info for spica. 
this is usefull information, before you update your image, check to see if the file size of your image is not exceed the size of the partition
For examples if you want to change the boot logo. In spica, the boot logo (logo.png) is located in partition 3. So if you have a new boot logo, make sure that file size of the image (logo.png) must below the size of partition 3 which is 384KB (0x00060000).
this is usefull information, before you update your image, check to see if the file size of your image is not exceed the size of the partition
For examples if you want to change the boot logo. In spica, the boot logo (logo.png) is located in partition 3. So if you have a new boot logo, make sure that file size of the image (logo.png) must below the size of partition 3 which is 384KB (0x00060000).
#cat /proc/rfs/bmlinfo
XSR VERSION: 1.5.2-p4
minor position size blocks id
1: 0x00000000-0x00020000 0x00020000 1 0
2: 0x00020000-0x00160000 0x00140000 10 1
3: 0x00160000-0x001c0000 0x00060000 3 2
4: 0x001c0000-0x006c0000 0x00500000 40 3
5: 0x006c0000-0x0c240000 0x0bb80000 1500 4
6: 0x0c240000-0x164c0000 0x0a280000 1300 5
7: 0x164c0000-0x1b540000 0x05080000 644 6
8: 0x1b540000-0x1dd40000 0x02800000 320 7
9: 0x1dd40000-0x1ed40000 0x01000000 128 8
10: 0x1ed40000-0x1f540000 0x00800000 64 9
(0) bad mapping information
No BadBlock RsvBlock
0: 802 4014