>>>>> "Tom" == Tom Yan <tom.ty89@xxxxxxxxx> writes: Tom> Since you've mentioned it, why do we disable write same for all Tom> devices with a ATA Information VPD? Generally speaking, SAS controllers that properly translate SCSI WRITE SAME to ATA ditto also support modern features such as the REPORT SUPPORTED OPERATION CODES command. For the SAS controllers that do not support RSOC we check for the ATA Information VPD page to determine whether we are talking to a SAS or SATA device. If it's a SATA device we skip WRITE SAME because in most cases either the controller's SATL or the drive itself will fail miserably. -- Martin K. Petersen Oracle Linux Engineering -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
