TLER on RAID Edition Internal Drives Cannot be Disabled

Western Digital RAID hard drives (UltraStar, WD Gold, WD Red) have a feature called TLER.

This stops the hard drive from entering into a deep recovery cycle.
It will only spend 7 seconds to attempt to recover.
This means that the hard drive will not be dropped from a RAID array.

TLER will not decrease speed when used in a non-RAID setup.

TLER cannot be turned off.