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UDMA Mode 6 vs 5

post #1 of 3
Thread Starter 
Just installed my new WD Cavair Black 1tb and noticed this in hd tune. This is on a p35-ds3l.




Also, it says firmware upgradeable. I looked around but didn't find anything on WD's website?

thanks
nod32
    
CPUMotherboardGraphicsRAM
E8400 3.6ghz 1.216v P35-DS3L 3850 256MB 735/1019 Mushkin 2gb 
Hard DriveOSPowerCase
WD Caviar Black 1tb 7 ultimate Mushkin HP-580 Centurion 5 
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CPUMotherboardGraphicsRAM
E8400 3.6ghz 1.216v P35-DS3L 3850 256MB 735/1019 Mushkin 2gb 
Hard DriveOSPowerCase
WD Caviar Black 1tb 7 ultimate Mushkin HP-580 Centurion 5 
  hide details  
Reply
post #2 of 3
Thread Starter 
bump
Anyone know what this UDMA thing is?

thanks
    
CPUMotherboardGraphicsRAM
E8400 3.6ghz 1.216v P35-DS3L 3850 256MB 735/1019 Mushkin 2gb 
Hard DriveOSPowerCase
WD Caviar Black 1tb 7 ultimate Mushkin HP-580 Centurion 5 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
E8400 3.6ghz 1.216v P35-DS3L 3850 256MB 735/1019 Mushkin 2gb 
Hard DriveOSPowerCase
WD Caviar Black 1tb 7 ultimate Mushkin HP-580 Centurion 5 
  hide details  
Reply
post #3 of 3
Thread Starter 
OK so I did a bit of research, and ran into many empty threads...
just like my own
But I decided to give achi mode a try as per some suggestions I found. I had to do a little registry tweak to get it to work in vista, but I had it up and running.

HD tune was also reporting the drives as running in UDMA mode 6
So I did some testing, on both of my drives (old hitachi 160gb and caviar black 1tb).

Turns out all achi did for me was increase the CPU usage by about 10%, and it seemed to cap the burst rate at 100MB/sec. I also found a couple threads about this, but they were also empty.

Anyways, I went back to the regular IDE emulation (is that what it is?).
    
CPUMotherboardGraphicsRAM
E8400 3.6ghz 1.216v P35-DS3L 3850 256MB 735/1019 Mushkin 2gb 
Hard DriveOSPowerCase
WD Caviar Black 1tb 7 ultimate Mushkin HP-580 Centurion 5 
  hide details  
Reply
    
CPUMotherboardGraphicsRAM
E8400 3.6ghz 1.216v P35-DS3L 3850 256MB 735/1019 Mushkin 2gb 
Hard DriveOSPowerCase
WD Caviar Black 1tb 7 ultimate Mushkin HP-580 Centurion 5 
  hide details  
Reply
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