Link to this headingRAW Nand Flash

https://www.j-michel.org/blog/2014/05/27/from-nand-chip-to-files
https://user.eng.umd.edu/~blj/CS-590.26/micron-tn2919.pdf

Link to this headingAdjacent Data and Spare Areas

512 Bytes of Data Area 16 Bytes of Spare Area ______________________ 512 Bytes of Data Area 16 Bytes of Spare Area ______________________ 512 Bytes of Data Area 16 Bytes of Spare Area ______________________ 512 Bytes of Data Area 16 Bytes of Spare Area

Link to this headingSeparate Data and Spare Areas

512 Bytes of Data Area 512 Bytes of Data Area 512 Bytes of Data Area 512 Bytes of Data Area 16 Bytes of Spare Area 16 Bytes of Spare Area 16 Bytes of Spare Area 16 Bytes of Spare Area

Link to this headingDumping data

Nand-dump-tool

./Nand-dump-tool.py -i full-dump.bin --layout=guess -I adda1095 -o main-dump.bin [*] Using given ID code ID code : adda1095 Manufacturer : Hynix Device : NAND 256MiB 3,3V 8-bit Die/Package : 1 Cell type : 2 Level Cell Simultaneously programmed paged : 2 Interleave between multiple chips: False Write cache : False Page size : 2048 bytes (2 K) Spare area size : 16 bytes / 512 byte Block size : 131072 bytes (128 K) Organization : X16 Serial access time : 25 ns OOB size : 64 bytes [*] Guessing NAND layout using hamming distance... [*] Guessed layout is: separate [*] Start dumping... [*] Finished Total: 276824064 bytes (264.00 MB) Data : 268435456 bytes (256.00 MB) OOB : 8388608 bytes (8.00 MB)

Link to this headingUBI/UBIFS

Do strings on the dump and see if the strings “UBI” or “UBIFS” exist. If so then this is a compressed file system.

Link to this headingMounting a Flash module from a dump

modprobe nandism first_id_byte=0xad second_id_byte=0xda third_id_byte=0x10 fourth_id_byte=0x95 dd if=main-dump.bin of=/dev/mtd0 modprobe ubi modprobe ubifs ubiattach --mtdn=0

If you run in to the error below then run the updated command

UBI error: validate_ec_hdr: bad VID header offset 2048, expected 512

New Mount Command:

ubiattach --mtdn=0 --vid-hdr-offset=2048