> -----Original Message----- > From: Moore, Eric [mailto:Eric.Moore@xxxxxxxx] > Sent: Wednesday, March 01, 2006 10:15 PM > To: Quat Le; dougg@xxxxxxxxxx > Cc: linux-scsi@xxxxxxxxxxxxxxx > Subject: Re: ATA Pass-Through support > > > No, the mptsas driver is not using libata, however we are using > scsi_transport_sas. > This is firmware assist implementation, meaning SCSI-to-ATA translation > is done in firmware; via queue_command entry point, all commands > to both SAS and SATA devices are sent via SCSI_IO passthru. Is the SG_IO > ATA passthru encapsalating an ATA command inside a SCSI CDB? > If so, I don't think the firmware folks have not implemented that yet. > When that is completed, I expect no change in driver, as its simply > passthru, and the firmware will handle the request. There is an > alternative, > you can send an IOCTL=MPT_COMMAND IOCTL using > the mptctl driver with the function set to > MPI_FUNCTION_SATA_PASSTHROUGH. > > > Eric Moore > LSI Logic Doug, SG_IO ioctl provides SCSI pass-through. It's the new SCSI extensions ATA Pass-Through commands (A1H and 85H) that sort of encapsulate ATA command in a SCSI CDB. My application is using this interface to perform SMART related functions to SATA drives. Could you please provide me with more information on your MPT_COMMAND_IOCTL and MPI_FUNCTION_SATA_PASSTHROUGH? Does anyone know of any SAS HBA vendor whose driver either uses libata or supports SATA Pass-Through SCSI commands in their own layer? Thanks, Quat Le - : 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
