TS-4900 eMMC Backup/restore

Write the image:

These commands assume you are booted to the SD card, and

# Verify nothing else has this mounted
umount /dev/mmcblk2p1

mkfs.ext4 /dev/mmcblk2p1
mkdir /mnt/emmc
mount /dev/mmcblk2p1 /mnt/emmc
wget ftp://ftp.embeddedarm.com/ts-socket-macrocontrollers/ts-4900-linux/distributions/yocto/fido/ts-x11-image-tsimx6-latest.tar.bz2
tar -xf ts-x11-image-tsimx6-latest.tar.bz2 -C /mnt/emmc
umount /mnt/emmc
sync

After it is written you can verify the data was written correctly.

# Drop any block cache
echo 3 > /proc/sys/vm/drop_caches
mount /dev/mmcblk2p1 /mnt/emmc
cd /mnt/emmc/
sudo md5sum -c md5sums.txt
umount /mnt/emmc
sync

The md5sum command will report what differences there are, if any, and return if it passed or failed.

Backup the image:

First boot the board to any SD image. The SD should have enough space for the compressed image of your eMMC. From our default image this is ~500MB. To create an image to your SD card:

mkdir /mnt/sd/
mount /dev/mmcblk1p1 /mnt/sd/
cd /mnt/sd/
tar -cjf /root/backup.tar.bz2 *
cd -
umount /mnt/sd/