pre-flash backup fails

Andy Green andy at
Mon Jul 21 10:30:19 CEST 2008

Hash: SHA1

Somebody in the thread at some point said:
| Andy Green wrote:
|> Yes dfu-util can be a bit promiscuous about which USB device it will try
|> to work with, I recall it trying to flash my device when I first met it
|> by talking to USB bluetooth device on that laptop.
|> I changed it to add
|> - -d 0x1d50:0x5119
|> to the dfu-util commandline and it was able to discriminate the
|> Freerunner USB device properly.
|> If that's the problem it should help.
| In my case that is not the problem, it actually gets quite a long way
through uploading the rootfs
| to my host via USB, before this happens. How far through it gets seems
to vary each time I try it.

Sounds like U-Boot DFU / USB support being crashy under stress, in your
other mail you mentioned it reboots.  I have used dfu-util in the other
direction, sending a new rootfs image, many times though and it worked OK.

Until Mike Montour noticed it the other day, our distribution package
for U-Boot was coming from months old sources.  Today or tomorrow the
U-Boot package in the repo should jump ahead many patches (although I
don't remember any for DFU).  One of the packages allows ext2 / 3 boot
from SD Card, if you are backing up your NAND rootfs so you can try ASU
or another image, you will be able to do it shortly from SD Card boot
fairly easily (after that U-Boot update).

- -Andy

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