Our old tape drives have failed and we not using tapes for backup anymore. We still have a stack of DLT tapes with backups which may contain sensitive information like credit card numbers, social security numbers, etc.
How do I responsibly dispose of these backup tapes?
If I had a working drive I would be tempted to dd from /dev/urandom to the tape device, but the drives have failed. Would this be a good method if the drive was still working? What do you recommend I do with these tapes given that I have no working drive for them?