/dev/sdd1      vfat      101M  4.5M   96M   5% /media/tethysadmin/BOOT
/dev/sdd2      ext3      3.9G  1.4G  2.3G  39% /media/tethysadmin/LINUX
/dev/sdd3      ext3       11G   28M  9.9G   1% /media/tethysadmin/XDATA


NOTE: (bk) one must umount the SD card prior to running dd for the advice below to work:

<<<<
I am trying to clone an SD card which may contain a number of partitions, some of which Ubuntu cannot recognize. Generally, I want to clone the whole volume, not only some partition. So, I mount the SD card and see something like this in the Log viewer:

kernel: [  262.025221]  sdc: sdc1 sdc2

alex@u120432:~$ ls /dev/sdc*
/dev/sdc  /dev/sdc1  /dev/sdc2
Since I want to copy the whole disk, I execute:

dd if=/dev/sdc of=sdimage.img bs=4M
File sdimage.img, 7.9 GB (7,944,011,776 bytes) is created (SD card is 8 GB). Now I mount another SD card and execute:

dd if=sdimage.img of=/dev/sdc bs=4M
<<<<<