For now, several hdparm flags work fine with libata SCSI drives. Eg. hdparm -W1, hdparm I, .. Sometime in the next month or two, I hope to update hdparm to use SGIO where possible/necessary to enable most of the remaining flags to function. Cheers - : 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