2 Replies Latest reply on Aug 8, 2012 2:07 PM by chrfranke

    SSD Intel 520 Reported running UMDA Mode 5 (ATA 100)



      Intel DZ68BC


      8 Gig (2x4) ram

      Intel 120 Gig Series 520 SSD


      Using the Intel Desktop Control Utility, under  System Info-Details-Hard Drive;   I see that the Max Transfer Mode is reported as UDMA 6 (ATA/133).

      But the utility also reports that the Active Transfer Mode is actually UDMA 5 (ATA/100)


      Is this normal?   Should the active mode be UDMA 6 as well?





      Edited to correctly identify the program used to see the transfer mode.

        • 1. Re: SSD Intel 520 Reported running UMDA Mode 5 (ATA 100)

          The Intel Desktop utility also reports this on my system.


          I guess that this is just a dummy value as all disks on my system are connected using sata.


          HWiNFO 4.02 reports for my SSD:


          Driver controller = Serial ATA 6Gb/s

          Ultra-DMA mode: total 5 (ata-100), Active 2 (ultra-dma/33)

          • 2. Re: SSD Intel 520 Reported running UMDA Mode 5 (ATA 100)

            Info about active DMA transfer modes can be ignored.


            SATA devices emulate the behavior of PATA transfer mode supported/enabled bits in ATA IDENTIFY data.


            Legacy IDE drivers could still be used to access SATA devices if controller is set to IDE Mode. A "Set Transfer Mode" ATA command issued by a legacy driver modifies IDENTIFY bits as expected but has no effect on the actual transfer rate. But changing to any PIO mode would have a significant effect as the legacy driver would use slow programmed I/O then.