DTRC On Symmetrix DMX4 - What Is This?

Good morning,

We are experiencing some issues with our DMX4 after a power down for maintenance purposes.

We have been told that our DMX4 is running DTRC. What is this process? Can it be monitored? Can it be stopped?

Here is the context that we are seeing it referenced:

The device had invalid on parity due to the DTRC and also doing BCV

Told the customer how DTRC works

Thanks in advance!