Comment 2 for bug 1568474

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Martin Pitt (pitti) wrote : Re: systemd-udevd[473]: Process '/lib/udev/hdparm' failed with exit code 5.

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!