75XX XNAND Recovery: Difference between revisions
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This needs to be done directly on the SBC. | This needs to be done directly on the SBC. If you are running from the SD card the XNAND will not be mounted by default. You can also boot to the initrd of the XNAND and unmount the xnand: | ||
<source lang=bash> | |||
umount /mnt/root | |||
</source> | |||
If there is no /mnt/root/ directory then the system is still booted to Debian and you should not proceed with the backup/restore sections. The image that is written or read back will be corrupt. | |||
You can find the latest xnand image [ | {{Warning|Rewriting the XNAND from a Debian filesystem on the XNAND will result in a corrupted image.}} | ||
You can find the latest xnand image [https://files.embeddedTS.com/ts-arm-sbc/ts-7500-linux/binaries/ts-images/xnandimg-latest.dd.bz2 here]. | |||
Once downloaded you can decompress the image using bzip2: | |||
<source lang=bash> | |||
bzip2 -d xnandimg-latest.dd.bz2 | |||
</source> | |||
The resulting file will be "xnandimg-latest.dd". | |||
'''Backup''' | '''Backup''' | ||
To create the image first connect a USB drive and then power the device on. Boot to the busybox environment and not the full Debian. The USB drive should be formatted with ext2/3 or fat32. | |||
<source lang=bash> | |||
killall nandctl | |||
mkdir /mnt/usb | |||
mount /dev/sda1 /mnt/usb | |||
nandctl -XR 2048 -z 131072 > /mnt/usb/backup.dd | |||
umount /mnt/usb | |||
sync | |||
</source> | |||
To backup the entire image containing the MBR/Kernel/Initrd/Debian you can run one command: | |||
<source lang=bash> | <source lang=bash> | ||
nandctl -XR 2048 -z 131072 > /path/to/backup.dd | nandctl -XR 2048 -z 131072 > /path/to/backup.dd | ||
</source> | </source> | ||
To backup the current kernel: | |||
<source lang=bash> | <source lang=bash> | ||
nandctl -XR 4096 -z 512 --seek part1 > /path/to/kernel | nandctl -XR 4096 -z 512 --seek part1 > /path/to/kernel | ||
</source> | </source> | ||
To backup the initrd: | |||
<source lang=bash> | <source lang=bash> | ||
nandctl -XR 4096 -z 512 --seek part2 > /path/to/initrd | nandctl -XR 4096 -z 512 --seek part2 > /path/to/initrd | ||
| Line 22: | Line 45: | ||
'''Restore''' | '''Restore''' | ||
To write the image first connect a USB drive with the image and then power the device on. Boot to the busybox environment and not the full Debian. The USB drive should be formatted with ext2/3 or fat32. | |||
<source lang=bash> | |||
killall nandctl | |||
mkdir /mnt/usb | |||
mount /dev/sda1 /mnt/usb | |||
nandctl -XW 2048 -z 131072 -i /mnt/usb/backup-image.dd | |||
umount /mnt/usb | |||
sync | |||
</source> | |||
To write the entire image containing the MBR/Kernel/Initrd/Debian you can run one command: | |||
<source lang=bash> | <source lang=bash> | ||
nandctl -XW 2048 -z 131072 -i /path/to/xnandimg-latest.dd | nandctl -XW 2048 -z 131072 -i /path/to/xnandimg-latest.dd | ||
</source> | </source> | ||
To write a new kernel: | |||
<source lang=bash> | <source lang=bash> | ||
nandctl - | dd if=zImage bs=512 conv=sync | nandctl -X -W 4095 -k kernel -z 512 -i -</source> | ||
</source> | |||
To write a new initrd: | |||
<source lang=bash> | <source lang=bash> | ||
nandctl - | dd if=initrd bs=512 conv=sync | nandctl -X -W 4095 -k initrd -z 512 -i - | ||
</source> | </source> | ||
Latest revision as of 16:27, 17 January 2022
This needs to be done directly on the SBC. If you are running from the SD card the XNAND will not be mounted by default. You can also boot to the initrd of the XNAND and unmount the xnand:
umount /mnt/root
If there is no /mnt/root/ directory then the system is still booted to Debian and you should not proceed with the backup/restore sections. The image that is written or read back will be corrupt.
| WARNING: | Rewriting the XNAND from a Debian filesystem on the XNAND will result in a corrupted image. |
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 create the image first connect a USB drive and then power the device on. Boot to the busybox environment and not the full Debian. The USB drive should be formatted with ext2/3 or fat32.
killall nandctl
mkdir /mnt/usb
mount /dev/sda1 /mnt/usb
nandctl -XR 2048 -z 131072 > /mnt/usb/backup.dd
umount /mnt/usb
sync
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 write the image first connect a USB drive with the image and then power the device on. Boot to the busybox environment and not the full Debian. The USB drive should be formatted with ext2/3 or fat32.
killall nandctl
mkdir /mnt/usb
mount /dev/sda1 /mnt/usb
nandctl -XW 2048 -z 131072 -i /mnt/usb/backup-image.dd
umount /mnt/usb
sync
To write 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:
dd if=zImage bs=512 conv=sync | nandctl -X -W 4095 -k kernel -z 512 -i -
To write a new initrd:
dd if=initrd bs=512 conv=sync | nandctl -X -W 4095 -k initrd -z 512 -i -