There is also a cryptographic erase option on secure erase if the drive supports it. It is nearly instantaneous and you can follow up with other slower methods if desired.<p>Also for SSDs, using the secure erase method is important because of overprovisioning and garbage collection. If that is not available, on most SSD algorithms, doing two full pass writes (with random sector data if drive supported compression) will get you close to wiping out all contents as possible.