Please add some debugging output to /lib/udev/hdparm with
sudo sed -i '2 s_^_set -x; exec 2>/tmp/hdparm.txt_' /lib/udev/hdparm
then re-run the event with
sudo udevadm trigger --action=add /sys/block/sda --verbose
then attach /tmp/hdparm.txt here. Thanks!
Please add some debugging output to /lib/udev/hdparm with
sudo sed -i '2 s_^_set -x; exec 2>/tmp/hdparm.txt_' /lib/udev/hdparm
then re-run the event with
sudo udevadm trigger --action=add /sys/block/sda --verbose
then attach /tmp/hdparm.txt here. Thanks!