In 2021, the State of Delaware, DelDOT, and the City of Newark penned an agreement to install so-called “clankers” at the Casho Mill Road bridge.

Delaware’s interpretation was a bit different than what engineers found at the NYC Port Authority and elsewhere. Engineers had found that the metal cans of those over height vehicle vehicle warning systems weren’t very loud. They also didn’t look particularly appealing. The solution? They grabbed a bunch of Taylor Made Tuff End vinyl boat fenders.

Running captive tests via SAT may not work because smartctl does not pass a long command timeout to the SCSI pass-through ioctl. And even then it would require that the SAT layer in the USB bridge firmware supports such long (several hours) timeouts.

Non-captive tests may be interrupted by a standby command sent to the drive after some time of I/O inactivity. Many USB bridges do this.

Try to run some script which accesses the drive during the test. This may work or not:

while true; do
   dd if=/dev/sdX iflag=direct count=1 of=/dev/null
   sleep 60
done

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