Mark, Thanks so much for implementing the Sanitize operations. I've put together a brief introduction and guide here: https://tinyapps.org/docs/ata_sanitize_hdparm.html . Aloha, Miles
See Linux DVD images (and how-to) for 32-bit EFI Macs (late 2006 models) for much more detail on this issue, including a simple C program for preparing other Linux ISOs.