MTD: How to get actual image size from MTD partition

Pintu Agarwal at
Mon Jul 19 05:09:46 EDT 2021

On Fri, 16 Jul 2021 at 21:56, Richard Weinberger <richard at> wrote:

> >> My requirement:
> >> To find the checksum of a real image in runtime which is flashed in an
> >> MTD partition.
> >
> > Try using the dm-verity module for ensuring that a block device really
> > is properly signed before mounting it.  That's what it was designed for
> > and is independent of the block device type.
> MTDs are not block devices. :-)
Is it possible to use dm-verity with squashfs ?
We are using squashfs for our rootfs which is an MTD block /dev/mtdblock44

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