04-25-2012 09:58 PM
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.
08-07-2012 03:15 PM
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)
08-08-2012 01:07 PM
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.