I work at an electronics recycling facility and we were just presented with an offer from a client that would like to buy our used data tapes. Our problem is that we have never sanitized data tapes as we have only shredded them in the past. I need to know if data tapes have the same properties as traditional rotating magnetic media where a DOD 3-Pass wipe is sufficient to sanitize the device or if there is any hidden dangers that we must be aware of.
The only way we can move forward with the deal our client has proposed is if we can 100%, without a doubt, know that the data is unrecoverable. On top of that we must have a method to verify that the data has been successfully sanitized, and there is no remnant previous user data.
Typically we would use a hex checking program for checking our hard drives after they have been sanitized, but I'm not sure if that will reliably work for data tapes. If anyone has any experience with sanitizing data tapes (other than degassing, or shredding) please let me know how the task was completed.