SD partitions

Here is a SD card with one Fat32 partition and another one ext2 partition.
Windows 5.x machine reports only about the first Fat32 and of course does not recognize the ext2. Using an utility called dskwipe, we can see the list of partitions as Window sees them:

C:\>dskwipe.exe -l
one of the lines will be the SD device name (0 here - the whole device, 1 - the first partition):
\Device\Harddisk1\Partition0

To access to the ext2 partition from CoLinux running atop the Windows we need to do the following:

1. Add to the colinux.conf the following line
   cobd1="\Device\Harddisk1\Partition0"
2. Load CoLinux and run fdisk /dev/cobd1
3. Press 'u' to switch to block counting mode
4. Press 'p' to output the partitions
5. Write down the starting point of the ext2 partition multiplied by 512, say it will be 17754534912
6. Setup a loop device:
   losetup -o 17754534912 /dev/loop1 /dev/cobd1
7. Check the file system integrity:
   e2fsck /dev/loop1
   
8. Mount the partition:
   mount /dev/loop1 /media/sd_ext2

Refresh partition info

If you changed the partition table using the fdisk utility, you don't need to reboot the machine. Just enough is to run the partprobe utility from the "parted" package.