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So we have a yocto warrior 2.7.1 system. Converting from an EOL board based on an ancient yocto to a newer one.

I have the following added to make rootfs RO.

IMAGE_FEATURES += " read-only-rootfs"

We have a very small handful of times when we need to do this:

mount -o remount,rw /

and of course revert back to RO.

The thing is that w/ the .hddimg it fails with

mount: /: cannot remount /dev/root read-write, is write-protected.

Of course the .wic image works fine, but unfortunately I can't use the .wic image for this project.

Any ideas would be greatly appreciated.

Extra info: Removing read-only-rootfs from the features then simply changing the fstab entry to ro from default in meta/base-files like below works, but creates other issues.

/dev/root            /                    auto       ro            1  1
Rachid K.
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H. Egan
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  • I was able to sort this out actually by removing read-only-rootfs and making a bbappend file for base-files. My earlier comment that it caused issues was incorrect. It all works fine. – H. Egan Oct 02 '20 at 22:29

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