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Date:      Sat, 15 Jan 2022 21:33:34 +0000
From:      bugzilla-noreply@freebsd.org
To:        standards@FreeBSD.org
Subject:   [Bug 255072] boot (legacy): no progress beyond 'BIOS DRIVE D: is disk1'
Message-ID:  <bug-255072-99-DzcNlITvMQ@https.bugs.freebsd.org/bugzilla/>
In-Reply-To: <bug-255072-99@https.bugs.freebsd.org/bugzilla/>
References:  <bug-255072-99@https.bugs.freebsd.org/bugzilla/>

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D255072

--- Comment #34 from spell@itl.ua ---
(In reply to Toomas Soome from comment #33)
> So, enforcing IO size to 1 sector (512B) does not help, but using buffer =
at 0x8000 does?
Enforcing IO size to 512 bytes does help. That is why I ever have paid
attention to buffer location variations.

> I still wonder if we could determine the size of corruption - note, we ca=
n increase the buffer area in BSS for test purposes.
Increasing bio_buffer size to BIO_BUFFER_SIZE*4 didn't help.

Trying to work out with the bd_io_workaround() and the comment about it and=
 to
detect possible buffer overrun...

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