On Tue, 2011-02-15 at 21:05 +0600, Bokhan Artem 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. >From the description, it's a firmware issue ... the driver tends to return exactly what the firmware tells it. There's definitely no special processing for ATA_12 or ATA_16 commands, they're treated as normal SCSI ones, so if there's no SAM_STAT_CHECK_CONDITION, the firmware isn't sending one. James -- 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
