Hello, everyone!

I have an S905M device (Sumavision Q5, RAM:1G, ROM:8G), I made a bootable USB with an Armbian image( ARMBIAN 5.44 user-built Ubuntu 18.04.5 LTS 3.14.29, use gxbb_p201.dtb file ) .

I want to use "ddbr"  then “b” to make a backup of the EMMC.  However,  

 

root@SumavisionQ5:~# ddbr

 DO YOU WANT TO BACKUP OR RESTORE ? 

 BACKUP=(b) RESTORE=(r) b

 UNABLE TO FIND ANY EMMC OR SD DRIVES ON THIS SYSTEM!!! 

 

then I use command  "lsblk", I found all partitions(cache, params,  ... , data) of the internal storage (8G ROM) for andriod system are treated as seperated disks as shown below:

 

root@SumavisionQ5:~# lsblk   

NAME      MAJ:MIN RM   SIZE RO TYPE MOUNTPOINT

sda         8:0    1  14.9G  0 disk 

|-sda1      8:1    1   128M  0 part /boot

`-sda2      8:2    1  14.6G  0 part /

cache     250:0    0   512M  0 disk 

params    250:1    0    64M  0 disk 

logo      250:2    0    32M  0 disk 

recovery  250:3    0    32M  0 disk 

rsv       250:4    0     8M  0 disk 

tee       250:5    0     8M  0 disk 

crypt     250:6    0    32M  0 disk 

misc      250:7    0    32M  0 disk 

instaboot 250:8    0   512M  0 disk 

boot      250:9    0    32M  0 disk 

system    250:10   0     1G  0 disk 

data      250:11   0   4.9G  0 disk 

zram0     253:0    0 100.9M  0 disk [SWAP]

zram1     253:1    0 100.9M  0 disk [SWAP]

zram2     253:2    0 100.9M  0 disk [SWAP]

zram3     253:3    0 100.9M  0 disk [SWAP]

 

use armbianmonitor -u,   a detail info is uploaded in 

http://ix.io/2vPI 

From that, I find something the 8G ROM is in NAND instead of in EMMC :

[ 6.263857] nandphy: Nand PHY Ver:XXX.XXX.001.0006 (c) 2013 Amlogic Inc.

[ 6.270503] nandphy: ######STS IRQ mode for nand driver

[ 6.275794] nandphy: NAND device id: 2c 64 44 4b a9 0 0 0

[ 6.281261] nandphy: detect NAND device: B revision NAND 8GiB MT29F64G08CBABA

[ 6.340701] nandphy: clk_reg = 81000244

[ 6.343380] nandphy: bus_c=6,bus_t=7,sys=4.0ns,T_REA=16,T_RHOH=15

[ 6.347931] nandphy: new oob mode

[ 6.352301] nandphy: NAND CKECK:arg nbbt:arg_valid=1,blk_addr=5,page_addr=0

[ 6.361720] nandphy: NAND CKECK:arg ncnf:arg_valid=1,blk_addr=4,page_addr=0

[ 6.382065] nandphy: NAND CKECK:arg phyp:arg_valid=1,blk_addr=8,page_addr=1

[ 6.402285] nandphy: NAND CKECK:arg nkey:arg_valid=1,blk_addr=9,page_addr=0

[ 6.432194] nandphy: NAND CKECK:arg ndtb:arg_valid=1,blk_addr=7,page_addr=33

[ 6.462225] nandphy: NAND CKECK:arg nenv:arg_valid=1,blk_addr=10,page_addr=9

[ 6.469413] nandphy: nfboot : [ 6.472338] nandphy: off:0x000000000000-0x000000800000 :partn=0:single_chip single_plane

[ 6.478386] nandphy: nfcache : [ 6.481817] nandphy: off:0x000006800000-0x000029000000 :partn=2:single_chip multi_plane

[ 6.489940] nandphy: nfcode : [ 6.493390] nandphy: off:0x00002f800000-0x000077000000 :partn=9:single_chip multi_plane

[ 6.501481] nandphy: nfdata : [ 6.504948] nandphy: off:0x0000a6800000-0x000159800000 :partn=1:single_chip multi_plane

 

How I can do it? 

Could command “ddbr” make a backup of NAND flash？

 

OK!

As far as I know，command “ddbr” can not make a backup of a andriod system in NAND flash.

 

________________________________________

Background...................................................

I also have a device (Tianyi, TY1208-Z, RAM:1G, ROM:8G) with S905L, and I have successfully made a backup file of EMMC. The EMMC is normally recognised as shown below:

root@aml:~# lsblk 

NAME         MAJ:MIN RM  SIZE RO TYPE MOUNTPOINT

mmcblk0      179:0    0  1.9G  0 disk 

|-mmcblk0p1  179:1    0  128M  0 part 

`-mmcblk0p2  179:2    0  1.7G  0 part 

mmcblk1      179:32   0  7.3G  0 disk 

|-mmcblk1p1  179:33   0  122M  0 part /boot

`-mmcblk1p2  179:34   0  6.5G  0 part /

mmcblk1boot0 179:64   0    4M  1 disk 

mmcblk1boot1 179:96   0    4M  1 disk 

zram0        253:0    0   50M  0 disk /var/log

zram1        253:1    0  417M  0 disk [SWAP]

Edited September 4, 20206 yr by admin_from_Mars

balbes150 replied to my topic in TV boxes：

There is no support for NAND in the main kernel.