[Bug 255072] boot (legacy): no progress beyond 'BIOS DRIVE D: is disk1'

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From: <bugzilla-noreply_at_freebsd.org>
Date: Sat, 15 Jan 2022 17:13:17 UTC

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=255072

--- Comment #33 from Toomas Soome <tsoome@freebsd.org> ---
(In reply to spell from comment #32)

Hm. So, enforcing IO size to 1 sector (512B) does not help, but using buffer at
0x8000 does? that is interesting. 

Btw, did you see comment in bd_io()? It is about proliant and large disk, but
it *may* explain the randomness factor...

I still wonder if we could determine the size of corruption - note, we can
increase the buffer area in BSS for test purposes.

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