Before TOS 6, if you wanted to wipe a disk in TNAS, it was typically a relatively cumbersome task. You had to remove the disk, connect it to the computer's SATA interface, or use an external device connected to the computer, and then utilize some disk utilities for the wiping operation.
However, with the introduction of TOS 6, the functionality of online disk wiping has been added. Now, you don't need to disassemble the disk or rely on external tools. By using the tools provided by TOS, you can easily perform disk wiping on TNAS without shutting down the device, significantly simplifying the entire operation process.