In the absence of physical destruction of hard drives including flash and SSD (since they are often re-used in different parts of the business or re-purposed for donation), the hard drives are securely wiped.
There doesn't appear to be an authoritative answer to whether all drives support DCO and HPA. Based on an article from Aleratec, it suggests that not all drives support DCO and HPA.
If this is accurate, does a secure wipe remove the ability to recover data if using wipe standards such as NIST 800-88?
What tools can be used to assess if a drive supports DCO and HPA? Currently we use Active@ KillDisk.