====== adding devices with different physical sector sizes is not allowed ======

<code bash>
zpool add hddpool log /dev/disk/by-id/nvme-XXXXXX-part8
cannot add to 'hddpool': adding devices with different physical sector sizes is not allowed
</code>

<code bash>
# get hddpool main disc sector size:
smartctl -a /dev/sda
Sector Sizes:     512 bytes logical, 4096 bytes physical

# get ashift of hddpool
zpool get ashift hddpool all-vdevs
NAME     PROPERTY  VALUE   SOURCE
ata-XXXXXXX-part2  ashift    12      -

# get sector size of LOG device:
smartctl -a /dev/nvme-XXXXXX
Namespace 1 Formatted LBA Size:     512
</code>

Solution:
<code bash>
zpool add hddpool log /dev/disk/by-id/nvme-XXXXXX-part8 -o ashift=12
</code>