从kernel 获取分区信息
mount
rootfs / rootfs ro,relatime 0 0
tmpfs /dev tmpfs rw,nosuid,relatime,mode=755 0 0
devpts /dev/pts devpts rw,relatime,mode=600 0 0
proc /proc proc rw,relatime 0 0
sysfs /sys sysfs rw,relatime 0 0
none /acct cgroup rw,relatime,cpuacct 0 0
tmpfs /mnt/asec tmpfs rw,relatime,mode=755,gid=1000 0 0
tmpfs /mnt/obb tmpfs rw,relatime,mode=755,gid=1000 0 0
none /dev/cpuctl cgroup rw,relatime,cpu 0 0
/dev/block/platform/omap/omap_hsmmc.1/by-name/system /system ext4 ro,relatime,barrier=1,data=ordered 0 0
/dev/block/platform/omap/omap_hsmmc.1/by-name/userdata /data ext4 rw,nosuid,nodev,noatime,barrier=1,nomblk_io_submit,data=ordered 0 0
/dev/block/platform/omap/omap_hsmmc.1/by-name/cache /cache ext4 rw,nosuid,nodev,noatime,barrier=1,nomblk_io_submit,data=ordered 0 0
/dev/block/platform/omap/omap_hsmmc.1/by-name/oem /oem ext4 rw,relatime,barrier=1,data=ordered 0 0
/sys/kernel/debug /sys/kernel/debug debugfs rw,relatime 0 0
/dev/fuse /mnt/sdcard fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0
127|root@android:/ # df
Filesystem Size Used Free Blksize
/dev 331M 32K 331M 4096
/mnt/asec 331M 0K 331M 4096
/mnt/obb 331M 0K 331M 4096
/system 525M 308M 216M 4096
/data 5G 353M 5G 4096
/cache 503M 8M 495M 4096
/oem 503M 8M 495M 4096
/mnt/sdcard 5G 353M 5G 4096
fdisk -l /dev/block/mmcblk0
Disk /dev/block/mmcblk0: 15532032 sectors, 14.8M
Logical sector size: 512
Disk identifier (GUID): f9f21fff-a8d4-5f0e-9746-594869aec34e
Partition table holds up to 128 entries
First usable sector is 34, last usable sector is 15532031
Number Start (sector) End (sector) Size(sector) Code Name
1 256 511 256 0700 xloader
2 512 1023 512 0700 bootloader
3 18432 20479 2048 0700 misc
4 20480 53247 32768 0700 efs
5 53248 69631 16384 0700 recovery
6 69632 86015 16384 0700 boot 8388608 0x800000
7 86016 1396735 1280K 0700 system 671088640 0x28000000
8 1396736 2445311 1024K 0700 cache
9 2445312 3493887 1024K 0700 oem
10 3493888 15052799 11.0M 0700 userdata 5905580032 0x160000000