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Date:      Tue, 25 Feb 2020 12:52:26 +0200
From:      Daniel Kalchev <daniel@digsys.bg>
To:        Mario Olofo <mario.olofo@gmail.com>
Cc:        Mark Millard via freebsd-stable <freebsd-stable@freebsd.org>
Subject:   Re: Running FreeBSD on M.2 SSD
Message-ID:  <188F34DA-192C-4D44-96B5-18A7DAE8EC67@digsys.bg>
In-Reply-To: <CAP4Gn9CqCSk5Lof_-05j1S0EWmTdB_HRfOe5zVig5khf7wJ0ow@mail.gmail.com>
References:  <CAP4Gn9DFAoQtq6NP4hZ-Jq=ddnhp7Bzc_X%2BSce2FPVWn6kjASg@mail.gmail.com> <202002250115.01P1F9KX090465@mail.karels.net> <CAP4Gn9CqCSk5Lof_-05j1S0EWmTdB_HRfOe5zVig5khf7wJ0ow@mail.gmail.com>

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I have had disks, that work =E2=80=9Cperfectly" under UFS and various =
RAID controllers (and DOS and Windows), but always reported checksum =
errors when running under ZFS. It would happen on any motherboard or =
controller. That made me never use anything but ZFS on data that I =
cannot recreate 100%, fast=E2=80=A6 but that is separate story. I =
labeled those disks bad and they sit in my =E2=80=9Cmuseum=E2=80=9D. =
Needless to say some were brand new. Not saying you have this issue, but =
sharing anecdotal evidence.

But I wonder how you discovered you had corruption with UFS? What is =
observed?

It might well be, that FreeBSD is more agressive with your =
motherboard/chipset or does not implement known quirk of that =E2=80=94 =
which might trigger some edge cases for the SSD. Ultimately, if you can =
move that SSD to another motherboard and test it, it would confirm where =
the issue is.

Daniel

> On 25 Feb 2020, at 3:35, Mario Olofo <mario.olofo@gmail.com> wrote:
>=20
> Hi Mike, thanks for the insight.
>=20
> I tried both, but not at the same time.
> When I found that the ZFS was corrupting the filesystem, I reinstalled =
the
> FreeBSD using UFS but no luck.
> Ulf told me that he had the same problem and it turned out the problem =
was
> a defective RAM, but here I just ran the test 2 times,
> one from Dell BIOS Diagnostics Tool and other from mdsched.exe from =
Windos
> 10, but here the RAM is ok...
>=20
> Thank you again,
>=20
> Mario
>=20




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