nbg6817

tools and infos about the ZyXEL NBG6817

Files

• nbg6817-dualboot: small tool for getting and setting the dualboot flag on the ZyXEL NBG6817, this can be used on LEDE and the ZyXEL OEM firmware
• dualflag-0x01-mmcblk0p8.bin: dump of the dualflag mtd, configured for 0x01/ /dev/mmcblk0p8
• dualflag-0xFF-mmcblk0p5.bin: dump of the dualflag mtd, configured for 0xFF/ /dev/mmcblk0p5

Partitioning

4 MiB SPI-NOR (Macronix MX25U3235F)

ZyXEL OEM firmware V1.00(ABCS.5)C0:

# cat /proc/mtd 
dev:    size   erasesize  name
mtd0: 000c0000 00010000 "SBL"
mtd1: 00040000 00010000 "TZ"
mtd2: 00040000 00010000 "RPM"
mtd3: 00080000 00010000 "u-boot"
mtd4: 00010000 00010000 "env"
mtd5: 00010000 00010000 "ART"
mtd6: 00010000 00010000 "dualflag"
mtd7: 00210000 00010000 "reserved"

LEDE

# cat /proc/mtd 
dev:    size   erasesize  name
mtd0: 00020000 00010000 "0:SBL1"
mtd1: 00020000 00010000 "0:MIBIB"
mtd2: 00020000 00010000 "0:SBL2"
mtd3: 00040000 00010000 "0:SBL3"
mtd4: 00010000 00010000 "0:DDRCONFIG"
mtd5: 00010000 00010000 "0:SSD"
mtd6: 00040000 00010000 "0:TZ"
mtd7: 00040000 00010000 "0:RPM"
mtd8: 00080000 00010000 "0:APPSBL"
mtd9: 00010000 00010000 "0:APPSBLENV"
mtd10: 00010000 00010000 "0:ART"
mtd11: 00010000 00010000 "0:DUAL_FLAG"
mtd12: 00210000 00010000 "0:RESERVED"

4 GiB internal eMMC (Kingston S10004)

# gdisk -l /dev/mmcblk0
GPT fdisk (gdisk) version 1.0.3

Partition table scan:
  MBR: protective
  BSD: not present
  APM: not present
  GPT: present

Found valid GPT with protective MBR; using GPT.
Disk /dev/mmcblk0: 7471104 sectors, 3.6 GiB
Sector size (logical): 512 bytes
Disk identifier (GUID): XXXXXXXX-XXXX-XXXX-XXXX-XXXXXXXXXXXX
Partition table holds up to 12 entries
Main partition table begins at sector 2 and ends at sector 4
First usable sector is 34, last usable sector is 7471070
Partitions will be aligned on 2-sector boundaries
Total free space is 1 sectors (512 bytes)

Number  Start (sector)    End (sector)  Size       Code  Name
   1              34            8225   4.0 MiB     FFFF  rootfs_data
   2            8226           16417   4.0 MiB     FFFF  romd
   3           16418           18465   1024.0 KiB  FFFF  header
   4           18466           26657   4.0 MiB     FFFF  kernel
   5           26658          157729   64.0 MiB    FFFF  rootfs
   6          157730          159777   1024.0 KiB  FFFF  header_1
   7          159778          167969   4.0 MiB     FFFF  kernel_1
   8          167970          299041   64.0 MiB    FFFF  rootfs_1
   9          299042          823329   256.0 MiB   FFFF  bu1
  10          823330         7471069   3.2 GiB     FFFF  bu2