Afaik, no, dd is just a normal command, you can pass conv=fdatasync and not have to worry about cache, but otherwise it's won't know about it.
Cool, never heard of bmaptool. The faster writes sounds awesome. Thanks for the info. On Nov 16, 2017 4:42 PM, "Philip Balister" <phi...@balister.org> wrote: > 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" < > > usrp-users@lists.ettus.com> 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 > >>> > >>> _______________________________________________ > >>> USRP-users mailing list > >>> USRP-users@lists.ettus.com > >>> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >>> > >> > >> _______________________________________________ > >> USRP-users mailing list > >> USRP-users@lists.ettus.com > >> http://lists.ettus.com/mailman/listinfo/usrp-users_lists.ettus.com > >> > > >
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