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Subject: [Bug 216964] boot1.efi: can't boot from ZFS on 4kn HDD
Date: Thu, 02 Mar 2017 18:39:12 +0000
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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=3D216964

Toomas Soome <tsoome@freebsd.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |tsoome@freebsd.org

--- Comment #5 from Toomas Soome <tsoome@freebsd.org> ---
(In reply to Sergey Kozlov from comment #4)

The hint is on the screenshot; error 4 is EFI_BAD_BUFFER_SIZE; and indeed, =
the
read size is 2048, thats half the sector. So the solution is that we need b=
oot1
to use buffer if the sector size is >512B.

The similar problem most likely will hit us in loader.efi.

The UFS is working because the ufs is using 4k data blocks - that is, all r=
eads
are at least 4k.

Hm, I think... probably the best solution is to make sure zfs code does pro=
vide
at least sector size buffer for reads. It is quite easy to do with 12-curre=
nt,
for 11, we would need to backport some updates.

--=20
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