Adding my 5 cents. T13 added Trim to the latest ATA8 proposal. http://www.t13.org/Documents/UploadedDocuments/docs2009/d2015r1-ATAATAPI_Command_Set_-_2_ACS-2.pdf This is after the changes put into the definition, with 'Deterministic Read after Trim'. This is not STANDARDIZED, but pretty much excepted by all sides. I was hoping that would settle the differences between T10/T13 on this - little did I know... We are working with David W. on his implementation for Trim feature, and hope to get to the bottom of debug process soon. Hope to update soon... Regards, Eyal Shani. -- 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