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Date:   Fri, 31 Jul 2020 07:46:39 +0100
From:   Christoph Hellwig <hch@infradead.org>
To:     Dave Chinner <david@fromorbit.com>
Cc:     Takuya Yoshikawa <takuya.yoshikawa@gmail.com>,
        linux-ext4@vger.kernel.org, linux-xfs@vger.kernel.org
Subject: Re: ext4/xfs: about switching underlying 512B sector devices to 4K
 ones
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On Thu, Jul 30, 2020 at 09:16:05AM +1000, Dave Chinner wrote:
> if you start with 4k devices, mkfs.xfs will detect 4k
> physical/logical devices and set it's sector size to 4k
> automatically and hence will work on those devices, but you can't
> change this retrospectively....

Alternatively you can force a larger sectors size manually at mkfs
time.