75XX XNAND Recovery

This needs to be done directly on the SBC. Please note that all NBD partitions from the NAND card must be dismounted before attempting to image the NAND on the SBC.

You can find the latest xnand image here. Once downloaded you can decompress the image using bzip2:

bzip2 -d xnandimg-latest.dd.bz2

The resulting file will be "xnandimg-latest.dd".

Backup

To backup the entire image containing the MBR/Kernel/Initrd/Debian you can run one command:

nandctl -XR 2048 -z 131072 > /path/to/backup.dd

To backup the current kernel:

nandctl -XR 4096 -z 512 --seek part1 > /path/to/kernel

To backup the initrd:

nandctl -XR 4096 -z 512 --seek part2 > /path/to/initrd

Restore

To restore the entire image containing the MBR/Kernel/Initrd/Debian you can run one command:

nandctl -XW 2048 -z 131072 -i /path/to/xnandimg-latest.dd

To write a new kernel:

nandctl -XW 4096 -z 512 --seek part1 -i /path/to/kernel

To write a new initrd:

nandctl -XW 4096 -z 512 --seek part2 -i /path/to/initrd