after removingrootfs successfully, when trying to mount root, getting error as "/dev/dm-0 read-write, is write-protected"

[open_source_freak]

I am using a Chrome image and trying to remove rootfs so that I can mount root as read write. 

#/usr/share/vboot/bin/make_dev_ssd.sh --remove_rootfs_verification --partitions 2 --force

      !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

      ! INFO: ALL SANITY CHECKS WERE BYPASSED. YOU ARE ON YOUR OWN. !

      !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!

Start in 1 second(s) (^C to abort)...

make_dev_ssd.sh: INFO: Kernel A: Disabled rootfs verification.

make_dev_ssd.sh: INFO: Backup of Kernel A is stored in: /mnt/stateful_partition/cros_sign_backups/kernel_A_20200421_065809.bin

make_dev_ssd.sh: INFO: Kernel A: Re-signed with developer keys successfully.

make_dev_ssd.sh: INFO: Successfully re-signed 1 of 1 kernel(s)  on device /dev/nvme0n1.

make_dev_ssd.sh: INFO: Please remember to reboot before updating the kernel on this device.

#reboot

#system reboot successful.

localhost ~ # mount -o remount,rw /

mount: /: cannot remount /dev/dm-0 read-write, is write-protected.

OS built used: R84.

Can anybody help here on how to overcome /dev/dm-0 read-write is write-protected error ? 

[dragon788]

If I recall you need to run this twice because there are two root partitions the system switches between.

[Hara Acharya]

Thanks for pointer.

For others to keep a note remove rootfs from both partitions 2 and 4 as below to mount the rootas RW:

#/usr/share/vboot/bin/make_dev_ssd.sh --remove_rootfs_verification --partitions 2 --force 

#/usr/share/vboot/bin/make_dev_ssd.sh --remove_rootfs_verification --partitions 4 --force 

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