Hi – I am following this page:
https://docs.yoctoproject.org/dev-manual/bmaptool.html
And I have some questions about the BMAPTOOL.
As part of a CI/CD process I need to create a disk image [file] I can later
write to an USB stick.
I don’t find instructions or examples to do that.
So I tried to figure it out on my own.
I did the following:
step 1:
sudo apt install bmap-tools
Step 2:
Bmap-tool copy
build-directory/tmp/deploy/images/machine/image.wic /dev/sdX
Instead of specifying /dev/sdX – I wrote it to a file, ie: “my-image.img”
Step 3 (first try)
I transferred that file to my PC and tried to use RUFUS to
write directly to a USB Stick.
Rufus has issues and crashes -> That is a seprate problem.
I will try etcher later today.
Step 3(alternate since that did not work)
I have GITBASH on my windows machine
So running GIT BASH as ADMIN, I tried this:
dd if=my-image.img of=/dev/sdc bs=16384
It writes very quickly with bs=16384, dam slow without “bs=16384”
This image is not bootable ☹
BUT if I write direct to the USB stick from my Virtual machine it works (ie:
Map the USB stick to my VM instead of the Windows Host) all I am doing is
replacing the FILE with the DEVICE
Questions:
1) is there docs for creating an IMAGE file? (This would be a good addition to
that page/link above)
2) Do I need to write to a partition? Ie: /dev/sdc1 instead of the device
/dev/sdc
3) Are there any examples of this I can/use follow
4) I did use DD to DUMP the first 4K or so of the disk to a file
Then compared that binary with the first 4K of the IMAGE file I created above
They match perfectly – so I believe the IMAGE file is being written correctly.
Thanks
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