Make sure you unmount the SD card file system first before using dd.
Ron
On 11/16/2017 02:24 PM, Mann, John - 0662 - MITLL via USRP-users wrote:
I tried issuing a sync command after the dd command - no help.
I also tried using bmaptool to burn the image. It still doesn’t work. And it
still took around 10 minutes - no faster than dd.
Both commands finish without any error messages.
The image file's md5 checksum is correct, so the image did not get corrupted
during the download.
I have even tried 2 different SD cards.
I'm running out of ideas... should I try a different host computer? Any way to
do this from Windows 7 or Windows 10?
-----Original Message-----
From: Philip Balister [mailto:[email protected]]
Sent: Thursday, November 16, 2017 4:43 PM
To: Anon Lister <[email protected]>
Cc: Mann, John - 0662 - MITLL <[email protected]>; usrp-users
<[email protected]>
Subject: Re: [USRP-users] Problem burning image to SD card for E312
On 11/16/2017 04:37 PM, Anon Lister wrote:
Make sure to run sync after to dd.
Interesting, I thought dd would run below the buffer cache layer.
Also curious as to reason for the recommendation against dd?
bmaptool is faster. bmaptool also checks to see if the device has a mounted
file system, so prevent you form overwriting something like /dev/sda.
Basically, safer and faster.
Philip
On Nov 16, 2017 12:35 PM, "Philip Balister via USRP-users" <
[email protected]> wrote:
Try bmaptool. dd is a bad idea, yeah I killed my hard drive once.
https://wiki.gnuradio.org/index.php/Copy_an_image_file_to_the_SD_card
The might even be package with Ubuntu. After writing, re-insert the
card in the writer and see if it mounts the partitions.
Philip
On 11/16/2017 10:54 AM, Mann, John - 0662 - MITLL via USRP-users wrote:
Running Ubuntu 16 on my host computer...
I downloaded the image from:
http://files.ettus.com/e3xx_images/e3xx-release-4/ettus-
e3xx-sg3/http://files.ettus.com/e3xx_images/e3xx-release-
4/ettus-e3xx-sg3/sdimage-gnuradio-dev.direct.xz
Then I decompressed the xz file using xzdec:
xzdec sdimage-gnuradio-dev.direct.xz >> sdimage-gnuradio-dev.direct
And burned the sd image using the dd command:
sudo dd if=sdimage-gnuradio-dev.direct of=/dev/sdb1 bs=1M
The dd command apparently finishes without error after about 10
minutes,
and I can see flashing lights on the SD card USB adapter, so I'm
pretty sure it is getting written to the correct place.
But the card does not work in the E312. When I turn it on, the 4
LEDs
next to the Tx/Rx ports light up, but there is no activity on the
console window. I have another SD card that boots up fine, so I know
the E312 is fine. There is clearly something wrong with the SD card.
When I plug the old working card into my Ubuntu host machine, I can
actually see the files on the card. When I plug the newly burned
card back into the Ubuntu machine, I see nothing.
Any idea what I am doing wrong?
John Mann
MIT Lincoln Laboratory
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