[Bug 249520] IO errors while mounting ZFS root on UEFI-booted RPi4 from USB3-attached external USB drive

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https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=249520

Robert Clausecker <fuz at fuz.su> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
         Resolution|---                         |Not A Bug
             Status|New                         |Closed

--- Comment #18 from Robert Clausecker <fuz at fuz.su> ---
(In reply to Mark Millard from comment #17)

Hi Mark,

Apparently bsdinstall sets up

    vfs.zfs.min_auto_ashift=12

in /etc/sysctl.conf to address this potential problem.  So you are right in
that this possibility is already addressed.

However, as I manually set up the zpool, this was not the case for me and I ran
head first into the problem.

For future reference: the thing that made me diagnose the problem is the CDB
showing a 5 sector read.  5 is not a multiple of 8...

Thanks for your excellent help anyway!

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