Backup and restore Android partitions to SD Card

android_backup_restore.sh

#!/sbin/sh

#open adb shell
adb shell

#listing partitions (general command for Android devices)
#ls -l /dev/block/platform/<block_device_name>/by-name/

#for the Galaxy Note 3
ls -l /dev/block/platform/msm_sdcc.1/by-name/

#for Galaxy Note 3, handles 4GB Limit on SD Card by splitting the backup into 2000MB Parts.

#backup
dd if=/dev/block/platform/msm_sdcc.1/by-name/boot | gzip -c | split -b 2000m - /external_sd/backup_dd/boot.gz.
dd if=/dev/block/platform/msm_sdcc.1/by-name/userdata | gzip -c | split -b 2000m - /external_sd/backup_dd/userdata.gz.
dd if=/dev/block/platform/msm_sdcc.1/by-name/system | gzip -c | split -b 2000m - /external_sd/backup_dd/system.gz.

#restore
cat /external_sd/backup_dd/boot.gz* | gzip -dc | dd of=/dev/block/platform/msm_sdcc.1/by-name/boot
cat /external_sd/backup_dd/userdata.gz* | gzip -dc | dd of=/dev/block/platform/msm_sdcc.1/by-name/userdata
cat /external_sd/backup_dd/system.gz* | gzip -dc | dd of=/dev/block/platform/msm_sdcc.1/by-name/system