If you don't trust the source this is a good way to check: openssl enc -aes-128-cbc -k lasldj -nosalt </dev/zero >/dev/sdX openssl enc -aes-128-cbc -k

If you don't trust the source this is a good way to check: openssl enc -aes-128-cbc -k lasldj -nosalt </dev/zero >/dev/sdX openssl enc -aes-128-cbc -k lasldj -nosalt | cmp - /dev/sdX Edit: now that I think about it, Joey's thinking this is something "Amazon clearly wants to cover up" might be misdirected. I'm sure Amazon values their customer as much as any other company in a highly competitive marketplace. They sure don't want you giving up on them for the corner computer store. A better explanation is "there is nothing more stupid as a bureaucracy", and in this case providing a sellers complaints system inappropriate reviews sounds like the perfect lair for a bureaucracy whose KPI is "seller complains resolved".