[BPI-R3] buggy sd-card written in ubuntu

#1

I have my own build root for openwrt snapshot.

It works :slight_smile:

Some strange behavior

normally I burn the image using this script to sd-card directly in ubuntu

gunzip bin/targets/mediatek/filogic/openwrt-mediatek-filogic-bananapi_bpi-r3-sdcard.img.gz

sudo dd if=bin/targets/mediatek/filogic/openwrt-mediatek-filogic-bananapi_bpi-r3-sdcard.img of=/dev/sdd

but these card will not boot in my R3 v1.1

ERROR:   MSDC: CRC error occured while reading data with cmd=17, arg=0x680000

ERROR:   MSDC: Command has timed out with cmd=17, arg=0x680000

ERROR:   BL2: Failed to load image id 3 (-5)

Regarding the reported crc-error in bootlog, the dd command only says

909701828 bytes (91 MB, 87 MiB) copied, 19.6752 s, 4,6 MB/s (no error)

If I use win32imager in Win11 with the same image to write the sdcard, all is fine. Edit: just found, the image is also not usable in Windows. Wondering, just yesterday that was the solution.

So I must have the bug in my buildroot. I changed the root partition size to 512 MB and added several packages. During make process I can´t see any errors. Do I have wrong build options?

Gotthard

#2

Have you run sync after dd finished? I guess image was not completely written (dd exits after data is written to cache)

#3

As I know (more than 30 year ago) the sync command works only on filesystems, not on block devices used by dd. I found this thread I will check, if I got time (the house is full in he next days :-))

#4

Looks like the card itself (rather than the content) is not compatible with the R3. Try with another card and see if that helps.

#5

tested it, dd was finished, but sync hangs after it and i see I/O on the card, so there is still a cache from dd which was not written to the card

#6

Sandisk 8 GB: above error (was written in 3,1 MB/s) similar Sandisk 8 GB: works (was written in 2,4 MBs) Noname 2 GB: above error (was written in 3,2 MB/s) Lync 8GB works Sandisk Ultra 16Gb other error

Failed to mount ext2 filesystem...
*** ERROR: Can't read GPT Entries ***
find_valid_gpt: *** ERROR: Invalid GPT ***
*** ERROR: Can't read GPT header ***
find_valid_gpt: *** ERROR: Invalid Backup GPT ***
*** Error - No Valid Environment Area found
*** Warning - bad env area, using default environment

It’s a good idea, to have more than one card at hand… In the future I’m using luci for updates, therefore the sdcard problem is a rare condition. Only wondering, I didn’t have such trouble during my R2 builds. Maybe since then I have new pc, new card writer.

JTFR Gotthard

#7

Have you tried running “sync” after writing to the non-working cards?

#8

Also dont use A2 class cards. Stay with A1

#9

If you are running Linux, try the following that I found in Openwrt forum.

#wipe SD card include magic string, # is the actual letter of your SD card in /dev list.
sudo wipefs -a /dev/sd#
#10

Ah, thats new for me. Will give it a try at next opportunity

thx for hint