Sorry forgot to link to http://www.t10.org/drafts.htm , one of which is: http://www.t10.org/ftp/t10/drafts/sat/sat-r09.pdf Page 104 was what I was following for my initial implementation plan. - To unsubscribe from this list: send the line "unsubscribe linux-ide" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html