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Date:      Tue, 19 Jul 2022 19:35:38 +0000
From:      bugzilla-noreply@freebsd.org
To:        fs@FreeBSD.org
Subject:   [Bug 265222] T480 zfs checksum mismatch error
Message-ID:  <bug-265222-3630-FX6rArgsZy@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-265222-3630@https.bugs.freebsd.org/bugzilla/>
References:  <bug-265222-3630@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D265222

--- Comment #4 from Mellowlink <mail@malisek.org> ---
(In reply to Graham Perrin from comment #3)
> ... use StressDisk for at least one round of non-stop writes.
I din run stressdisk on another system for both the nvme and the sata ssd I=
've
used for the T480. No errors reported either.

> Try giving the entire disk to UFS ...
Good point. I installed FreeBSD on top of UFS on the T480 with nvme drive.
On UFS pkg doesn't report immediate checksum mismatch when installing packa=
ges
when X11 is running.
/var/log/messages doesn't print errors either.

But after I've kept the system running for about a day and then I've run for
several times:
pkg check -s -a=20
It prints checksum mismatch for different files each time i run the pkg che=
ck.=20
I've tried manually getting checksums for files it reported with mismatch a=
nd
I've found interesting.

root@ltop:~ # date
Tue Jul 19 20:48:18 CEST 2022
root@ltop:~ # sha256sum /usr/local/lib/dri/i915_dri.so
7c0a80ce2f115366b4020f83015a888234cbf51e0691ad26f47548d4b3181cc1=20
/usr/local/lib/dri/i915_dri.so
root@ltop:~ # sha256sum /usr/local/lib/dri/i915_dri.so
7c0a80ce2f115366b4020f83015a888234cbf51e0691ad26f47548d4b3181cc1=20
/usr/local/lib/dri/i915_dri.so
root@ltop:~ # sha256sum /usr/local/lib/dri/i915_dri.so
354758bd1937640e7559f60517a25787d65d7cd98bc7f32d38c440d385dd7436=20
/usr/local/lib/dri/i915_dri.so
root@ltop:~ # sha256sum /usr/local/lib/dri/i915_dri.so
7c0a80ce2f115366b4020f83015a888234cbf51e0691ad26f47548d4b3181cc1=20
/usr/local/lib/dri/i915_dri.so
root@ltop:~ # sha256sum /usr/local/lib/dri/i915_dri.so
354758bd1937640e7559f60517a25787d65d7cd98bc7f32d38c440d385dd7436=20
/usr/local/lib/dri/i915_dri.so
root@ltop:~ # sha256sum /usr/local/lib/dri/i915_dri.so
354758bd1937640e7559f60517a25787d65d7cd98bc7f32d38c440d385dd7436=20
/usr/local/lib/dri/i915_dri.so
root@ltop:~ # sha256sum /usr/local/lib/dri/i915_dri.so
7c0a80ce2f115366b4020f83015a888234cbf51e0691ad26f47548d4b3181cc1=20
/usr/local/lib/dri/i915_dri.so
root@ltop:~ # sha256sum /usr/local/lib/dri/i915_dri.so
7c0a80ce2f115366b4020f83015a888234cbf51e0691ad26f47548d4b3181cc1=20
/usr/local/lib/dri/i915_dri.so
root@ltop:~ # sha256sum /usr/local/lib/dri/i915_dri.so
354758bd1937640e7559f60517a25787d65d7cd98bc7f32d38c440d385dd7436=20
/usr/local/lib/dri/i915_dri.so
root@ltop:~ # date
Tue Jul 19 20:48:34 CEST 2022

As you can see static file such as this outputs two different checksums wit=
hin
small timespan.
This seems like an i/o error.=20
What could be possible cause of this? As I stated before, the t480 both
motherboards, drives and cables for drives are new.
The BIOS version is 1.44 (also newest one as of today).=20

Could that be possibly caused by drivers?

--=20
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