dump nand of one ci20 and restore backup on another ci20

[Gerard Berto]

Hello,

I try to do a backup of the nand and restore it on another ci20. I've found that mtd-utils is done for that, especially nanddump, flash_erase and nandwrite. I tried:

for i in {0..4}; do sudo nanddump /dev/mtd${i} -f mtd${i}.bak; done

for i in {0..4}; do sudo flash_erase /dev/mtd$i 0 0; done

for i in {0..4}; do sudo nandwrite /dev/mtd$i mtd$i.bak; done

When I try to boot, u-boot works well, but I have a kernel panic:

UBIFS error (pid 0): ubifs_check_node: bad CRC: calculated 0x673f7bda, read 0xad

UBIFS error (pid 0): ubifs_check_node: bad node at LEB 0:0

UBIFS error (pid 0): ubifs_read_node: expected node type 6

UBIFS error (pid 0): ubifs_mount: Error reading superblock on volume 'ubi:boot'!

ubifsmount - mount UBIFS volume Usage: ubifsmount <volume-name> - mount 'volume-name' volume

UBIFS not mounted, use ubifs mount to mount volume first! ubifsload - load file from an

UBIFS filesystem Usage: ubifsload <addr> <filename> [bytes] - load file 'filename' to address 'addr' Wrong Image Format for bootm command ERROR: can't get kernel image!

Do you know how to dump and restore properly nand from ci20? (and maybe others devices as method is probably the same)

Thank you,

Nuliel