On 11-02-15 05:20 AM, Artem Bokhan wrote:
Hello! I'm trying to get/set sctserc (SMART Command Transport Error Recovery Control) data from sata disk attached to lsi megaraid controller with smartmontools, but this function does not work. I want to figure out: is this driver or firmware issue? May someone to help to fix this? The issue can be described as follows: The ATA PASS-THROUGH(16) implementation in the SAT layer of the megaraid driver or firmware does not return the ATA output registers if requested. This violates SAT standard (http://www.t10.org/drafts.htm#SAT). Expected: If CK_COND (bit 5 of CDB[2]) is set, ATA PASS-THROUGH(16) (CDB[0] = 0x85) shall return a CHECK CONDITION even if the ATA command completed successfully, and return the ATA output registers in the sense data using ATA return descriptor format (descriptor code 0x09). Observed: If CK_COND is set and the ATA command completed successfully, ATA PASS-THROUGH(16) does not return a CHECK CONDITION or the sense data does not contain an ATA return descriptor. See also the smartmontools SAT implementation (http://sourceforge.net/apps/trac/smartmontools/browser/trunk/smartmontools/scsiata.cpp?rev=3258#L146) for further info.
That code looked familiar but I'm not sure what your point was referring to it. Anyway ... Haven't worked much with Megaraid controllers but mptsas controllers implement SAT (or at least did) in their firmware. So upgrading the firmware on the controller fixed the problems I had (some years back) with SAT compliance. Doug Gilbert -- 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
