[Samsung Galaxy Nexus] scandiun:
List of devices by name:

su
ls -l/dev/block/platform/omap/omap_hsmmc.0/by-name/

List of fdisk for all given partitions:

Command (needs Superuser or equivalent and Busybox):

su
find /dev/block/platform/ -name 'mmc*' -exec fdisk -l {} \; > /sdcard/list_of_gnex_partitions.txt

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0boot0: 0 MB, 524288 bytes
4 heads, 16 sectors/track, 16 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0boot0 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0boot1: 0 MB, 524288 bytes
4 heads, 16 sectors/track, 16 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0boot1 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p13: 0 MB, 65536 bytes
4 heads, 16 sectors/track, 2 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p13 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p12: 14.5 GB, 14539537408 bytes
4 heads, 16 sectors/track, 443711 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p12 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p11: 452 MB, 452984832 bytes
4 heads, 16 sectors/track, 13824 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p11 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p10: 685 MB, 685768704 bytes
4 heads, 16 sectors/track, 20928 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p10 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p9: 16 MB, 16777216 bytes
4 heads, 16 sectors/track, 512 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p9 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p8: 12 MB, 12517376 bytes
4 heads, 16 sectors/track, 382 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p8 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p7: 8 MB, 8388608 bytes
4 heads, 16 sectors/track, 256 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p7 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p6: 4 MB, 4194304 bytes
4 heads, 16 sectors/track, 128 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p6 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p5: 4 MB, 4194304 bytes
4 heads, 16 sectors/track, 128 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p5 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p4: 8 MB, 8388608 bytes
4 heads, 16 sectors/track, 256 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p4 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p3: 20 MB, 20971520 bytes
4 heads, 16 sectors/track, 640 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p3 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p2: 3 MB, 3670016 bytes
4 heads, 16 sectors/track, 112 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p2 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p1: 0 MB, 131072 bytes
4 heads, 16 sectors/track, 4 cylinders
Units = cylinders of 64 * 512 = 32768 bytes

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0p1 doesn't contain a valid partition table

Disk /dev/block/platform/omap/omap_hsmmc.0/mmcblk0: 15.7 GB, 15758000128 bytes
1 heads, 16 sectors/track, 1923584 cylinders
Units = cylinders of 16 * 512 = 8192 bytes

Device Boot Start End Blocks Id System
/dev/block/platform/omap/omap_hsmmc.0/mmcblk0p1 1 1923584 15388671+ ee EFI GPT
Partition 1 does not end on cylinder boundary

Mounted filesystems:

su
df

Filesystem Size Used Free Blksize
/dev 347M 32K 347M 4096
/mnt/asec 347M 0K 347M 4096
/mnt/obb 347M 0K 347M 4096
/system 643M 347M 295M 4096
/factory 19M 8M 11M 4096
/cache 425M 7M 418M 4096
/data 13G 773M 12G 4096
/storage/sdcard0 13G 773M 12G 4096

Temporary fstab:

su
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.0/by-name/system /system ext4 ro,relatime,barrier=1,data=ordered 0 0

/dev/block/platform/omap/omap_hsmmc.0/by-name/efs /factory ext4 ro,relatime,barrier=1,data=ordered 0 0

/dev/block/platform/omap/omap_hsmmc.0/by-name/cache /cache ext4 rw,nosuid,nodev,noatime,errors=panic,barrier=1,nomblk_io_submit,data=ordered 0 0

/dev/block/platform/omap/omap_hsmmc.0/by-name/userdata /data ext4 rw,nosuid,nodev,noatime,errors=panic,barrier=1,nomblk_io_submit,data=ordered 0 0

/sys/kernel/debug /sys/kernel/debug debugfs rw,relatime 0 0

/dev/fuse /storage/sdcard0 fuse rw,nosuid,nodev,relatime,user_id=1023,group_id=1023,default_permissions,allow_other 0 0

Links:

How to install Jelly Bean 4.1 on Galaxy Nexus GSM edition

[GUIDE] Making Dump Files Out of Android Device Partitions