root@android:/ # cat /proc/partitions
cat /proc/partitions
major minor  #blocks  name

 179        0    3776512 mmcblk0
 179        1         20 mmcblk0p1
 179        2        150 mmcblk0p2
 179        3      81920 mmcblk0p3
 179        4          1 mmcblk0p4
 179        5       1000 mmcblk0p5
 179        6       1000 mmcblk0p6
 179        7       2000 mmcblk0p7
 179        8      16384 mmcblk0p8
 179        9       3072 mmcblk0p9
 179       10       3072 mmcblk0p10
 179       11       3072 mmcblk0p11
 179       12     589824 mmcblk0p12
 179       13     983040 mmcblk0p13
 179       14      20480 mmcblk0p14
 179       15     262144 mmcblk0p15
 179       16      16384 mmcblk0p16
 179       17       1000 mmcblk0p17
 179       18       1000 mmcblk0p18
 179       19       4096 mmcblk0p19
 179       20    1720320 mmcblk0p20