Well, the dd run for more than 40 hours and only copied 140M with a number of errors. I will continue later. Will try to get a system running with an mSATA SSD then will continue attempting to restore data.
Example of dd errors:
[128501.163907] mmcblk0: error -110 sending stop command, original cmd response 0x80000900, card status 0x400900
[128501.173868] mmcblk0: r/w command failed, status = 0x80000900
[128501.179630] blk_update_request: I/O error, dev mmcblk0, sector 285880
[128501.186189] Buffer I/O error on dev mmcblk0, logical block 35735, async page read
dd: /dev/mmcblk0: I/O error
[128506.564174] mmcblk0: error -110 sending stop command, original cmd response 0x80000900, card status 0x400900
[128506.574135] mmcblk0: r/w command failed, status = 0x80000900
[128506.579895] blk_update_request: I/O error, dev mmcblk0, sector 285880
[128506.586455] Buffer I/O error on dev mmcblk0, logical block 35735, async page read
dd: /dev/mmcblk0: I/O error
[128511.964455] mmcblk0: error -110 sending stop command, original cmd response 0x80000900, card status 0x400900
[128511.974417] mmcblk0: r/w command failed, status = 0x80000900
[128511.980178] blk_update_request: I/O error, dev mmcblk0, sector 285880
[128511.986738] Buffer I/O error on dev mmcblk0, logical block 35735, async page read
dd: /dev/mmcblk0: I/O error
[128517.365292] mmcblk0: error -110 sending stop command, original cmd response 0x80000900, card status 0x400900
[128517.375254] mmcblk0: r/w command failed, status = 0x80000900
[128517.381030] blk_update_request: I/O error, dev mmcblk0, sector 285880
[128517.387574] Buffer I/O error on dev mmcblk0, logical block 35735, async page read
dd: /dev/mmcblk0: I/O error
[128522.765349] mmcblk0: error -110 sending stop command, original cmd response 0x80000900, card status 0x400900
[128522.775310] mmcblk0: r/w command failed, status = 0x80000900
[128522.781087] blk_update_request: I/O error, dev mmcblk0, sector 285888
[128522.787630] Buffer I/O error on dev mmcblk0, logical block 35736, async page read
dd: /dev/mmcblk0: I/O error
[128528.165744] mmcblk0: error -110 sending stop command, original cmd response 0x80000900, card status 0x400900
[128528.175706] mmcblk0: r/w command failed, status = 0x80000900
[128528.181484] blk_update_request: I/O error, dev mmcblk0, sector 285888
[128528.188028] Buffer I/O error on dev mmcblk0, logical block 35736, async page read
dd: /dev/mmcblk0: I/O error
This is the output from mmc u-boot command:
=> mmc
mmc - MMC sub system
Usage:
mmc info - display info of the current MMC device
mmc read addr blk# cnt
mmc write addr blk# cnt
mmc erase blk# cnt
mmc rescan
mmc part - lists available partition on current mmc device
mmc dev [dev] [part] - show or set current mmc device [partition]
mmc list - lists available devices
mmc hwpartition [args...] - does hardware partitioning
arguments (sizes in 512-byte blocks):
[user [enh start cnt] [wrrel {on|off}]] - sets user data area attributes
[gp1|gp2|gp3|gp4 cnt [enh] [wrrel {on|off}]] - general purpose partition
[check|set|complete] - mode, complete set partitioning completed
WARNING: Partitioning is a write-once setting once it is set to complete.
Power cycling is required to initialize partitions after set to complete.
mmc setdsr <value> - set DSR register value
=> mmc info
Device: mv_sdh
Manufacturer ID: 65
OEM: 646f
Name: M MOR
Tran Speed: 52000000
Rd Block Len: 512
MMC version 4.4.1
High Capacity: Yes
Capacity: 2 TiB
Bus Width: 8-bit
Erase Group Size: 512 Bytes
HC WP Group Size: 512 KiB
User Capacity: 2 TiB
Boot Capacity: 2 MiB ENH
RPMB Capacity: 128 KiB ENH
=> mmc list
mv_sdh: 0 (eMMC)
=> mmc rescan
=> mmc list
mv_sdh: 0 (eMMC)
=> mmc info
Device: mv_sdh
Manufacturer ID: 65
OEM: 646f
Name: M MOR
Tran Speed: 52000000
Rd Block Len: 512
MMC version 4.4.1
High Capacity: Yes
Capacity: 2 TiB
Bus Width: 8-bit
Erase Group Size: 512 Bytes
HC WP Group Size: 512 KiB
User Capacity: 2 TiB
Boot Capacity: 2 MiB ENH
RPMB Capacity: 128 KiB ENH
=> mmc part
## Unknown partition table
What does partition table on a normal device look like?