Read-only file system for AGX Xavier on Jp4.6.2

Robotics & Edge Computing Jetson & Embedded Systems Jetson AGX Xavier
1

Hi

I’m trying make a Read-only rootfs on Emmc by overlayroot

I can successfully make it on Xavier NX and Nano

But it failed on AGX Xavier

The step reference here:

Could you help to check why it didn’t work on AGX Xavier?

3

Hi zax,

Are you using the devkit or custom board for AGX Xavier?
What’s your Jetpack version in use?

It seems the 3-rd party tool and we didn’t verify it before.
What issue do you hit now? Could you share any logs?

4

Hi KevinFFF,

I tried both custom board and devkit, the result is the same

Jetpack4.6.2 is not work, but Jetpack4.6 is ok just test recently

If there’s any official way to make a read-only rootfs, please help to tell me

The github use ovrlayroot, and the script it actually do the same things as Protecting the Root Filesystem on Ubuntu with Overlayroot

5

I’ve just referred to the steps in your link and verified it could work for AGX Xavier devkit with JP4.6.4 (L4T R32.7.4).

Please verify with R32.7.4 and share the logs.

1 Like
6

Hi KevinFFF,

Thanks for help, JP4.6.4 works

But I need your confirm that AGX Xavier can’t work for read-only rootfs on JP4.6.2 to persuade our customer

Could you help to check again on JP4.6.2?

And if possible, please tell me why it is not working

Thanks

7

Normally, we would only verify with the latest release. (for R32, it is R32.7.4).

Do you have any requirement for JP4.6.2?
There might be several fixes and update between them.

8

Is there any release note mention about these?

9

Could you try to modify the in /etc/fstab from defaults to ro and reboot the board to make rootfs read-only?

10

Sorry late for reply

After modified the in /etc/fstab from defaults to ro and reboot

The system showed many error message while booting, then stock

image
image593×789 79.9 KB

I can enter the system through uart debug port

And check the rootfs is ro, but it seems not a good solution
mount.log (2.5 KB)

11

Since overlayroot would mount your partition at /media/root-ro rather than changing the whole rootfs to read-only as you modified in /etc/fstab.

I would suggest just using the latest R32.7.4 for your use case.

12

okay

Thanks for help

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