Re: File system robustness

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CC linux-ext4, dm-devel

On Mon, Jul 17, 2023 at 10:13 AM Kai Tomerius <kai@xxxxxxxxxxx> wrote:
>
> Hi,
>
> let's suppose an embedded system with a read-only squashfs root file
> system, and a writable ext4 data partition with data=journal.
> Furthermore, the data partition shall be protected with dm-integrity.
>
> Normally, I'd umount the data partition while shutting down the
> system. There might be cases though where power is cut. In such a
> case, there'll be ext4 recoveries, which is ok.
>
> How robust would such a setup be? Are there chances that the ext4
> requires a fsck? What might happen if fsck is not run, ever? Is there
> a chance that the data partition can't be mounted at all? How often
> might that happen?
>
> Thx
> regards
> Kai



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