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

[b***@freebsd.org]

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

Robert Clausecker <***@fuz.su> changed:

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

--- Comment #18 from Robert Clausecker <***@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!