Safest method of backing of MTD partitions (ex. mtd10)

[Jeffrey Young]

I am looking to be a bit proactive and backup some of the more critical memory areas of my AX86U-Pro, such as the MTD10 partition, where a lot of the WiFi data is stored. That way, should I ever have to replace the NAND chip or reformat it due to corruption, I can restore the information specific to my router as opposed to it becoming ewaste.

I was able to backup the entire MTD0 block using nanddump , but I am looking to dump the individual partitions. Since most of them are mounted, I get resource busy errors.

As opposed to blindly trying ubidetach or umount the partitions, I thought I would ask here first.

Just hoping to one day keep one less device out of the land fill....

Thanks

 

[ColinTaylor]

I've found that nanddump (without extra parameters), dd and cat all produce identical output files. But my flash memory doesn't contain any bad blocks so I don't know whether that would make any difference.

From what I've seen on these forums people don't seem to have much luck trying to write data onto a new flash memory chip from a backup taken using the above methods. It seems to need to be backed up at a hardware level using a chip reader/programmer. Maybe something to do with byte swapping, etc. But that's just a guess and may depend on the capabilities of the programmer you're using.