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From: Sitsofe Wheeler <sitsofe@gmail.com>
Date: Mon, 13 Jan 2020 08:04:18 +0000
Message-ID: <CALjAwxioWYxdHY+myk=tSkncuQn8qLdVUTGSSDzprSSsHJJKYA@mail.gmail.com>
Subject: Re: 4KiB + 64 B formatted drive : Invalid or incomplete multibyte or
 wide character: write offset=4096, buflen=4096
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Sender: fio-owner@vger.kernel.org
List-Id: fio@vger.kernel.org
To: "Elliott, Robert (Servers)" <elliott@hpe.com>
Cc: smitha sunder <sundersmitha@gmail.com>, fio <fio@vger.kernel.org>

On Fri, 10 Jan 2020 at 06:35, Elliott, Robert (Servers) <elliott@hpe.com> wrote:
>
> What are all those reads to LBA 3750748672? Something is looking
> for partition tables?
>
> You're using direct=1 so the page cache shouldn't be doing
> prefetching.

If you scribble over the start of a disk that can trigger udev rules
to rescan partitions and maybe that is checking for a backup GPT...

-- 
Sitsofe | http://sucs.org/~sits/