Yup. A single pass is sufficient, in general, and I've power cycled a system in the middle of a dban pass. Since data loss is a desired outcome, you shouldn't have any issues hitting the reset switch.
The guttman method is designed to use a variety of patterns and wiping method to securely erase every possible encoding method in use then. With modern drives having much smaller magnetic domains, a few scrubs with random data will do according to guttman.
With modern systems, the secure delete command will likely do a better job, faster.