i.MX ProcessorsのトピックRe: How can I boot the rootfs readonly?

How can I boot the rootfs readonly?

blangero_wang — Fri, 14 Feb 2014 09:10:53 GMT

Hi:

I want to load rootfs readonly on my imx6q, the rootfs is debian_armhf.

In uboot I set the args as:

setenv bootargs_mmc 'setenv bootargs ${bootargs} root=/dev/mmcblk1p1 rootwait ro video=mxcfb0:dev=lcd,1440x900,if=RGB24'

and I do get verbose in bootup:

EXT3-fs (mmcblk1p1): mounted filesystem with writeback data mode

VFS: Mounted root (ext3 filesystem) readonly on device 179:25.

But in the system I still get rw in mtab and the rootfs is still writable.

How can I solve it?

Thanks!

Re: How can I boot the rootfs readonly?

blangero_wang — Thu, 20 Feb 2014 07:01:25 GMT

I got it resolved.

It's the fstab file which defines the readonly, but not uboot args.

Re: How can I boot the rootfs readonly?

katherrafi — Tue, 10 Jul 2018 11:59:23 GMT

Hope this may help to make the read only in fstab.

/dev/root / auto remount,ro 1 1

Re: How can I boot the rootfs readonly?

Raana — Thu, 27 Jun 2019 12:07:38 GMT

Hi Blangero Wang,

Even I've tried the same in boot arguments, but failed. So, I've tried with fstab and it's working fine.
May I know,
Why 'ro' is not working in boot arguments ?
Is this related to NXP or default uboot or something ?
Whether 'fstab' is the only way or fine way to make rootfs as 'ro' ?

Thank You.

Best Regards,

J.P.Raja

Re: How can I boot the rootfs readonly?

Raana — Wed, 03 Jul 2019 06:54:07 GMT

Hi Kather Rafi,

Thank You.

Best Regards,

J.P.Raja

Re: How can I boot the rootfs readonly?

shaoxiao_guo_dn — Wed, 08 Sep 2021 01:52:39 GMT

Do you know why now?