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Yes, you can boot using the kernel cmdline

rd.cos.debugrw=1

Is this something you put in the device registration?

You can edit it in the grub boot screen or put it in a

/etc/cos/bootargs.cfg

in the built container.

Apologies to to be so stupid but how to I modify the grub bootscreen? Tried to add the setting in the current Grub params but it seems not to boot in read/write mode. I added the set rd.cos.debugrw=1 below the initrd in the setparams ‘Elemental’ sections

Oh sorry, the

rd.cos.debugrw=1

should be added to the kernelcmd parameter.. something like:

set kernelcmd="console=tty1 console=ttyS0 root=LABEL=$state_label cos-img/filename=$img panic=5 rd.cos.oemlabel=$oem_label rd.cos.mount=LABEL=$oem_label:/oem rd.cos.mount=LABEL=$persistent_label:/usr/local fsck.mode=force fsck.repair=yes rd.cos.debugrw=1"

Thanks a lot @witty-table-40840 It works!!!!

Awesome!