How can you tell if you are running ata 66? Or ata 33?

[Cybordolphin]

Can Windows system check show this?

Thanks.

 

[AndyHui]

Running Windows 2000 or not? For Win2K, you may need to enable it. Win9x does not need this. Check the BIOS readout on boot-up. ATA/UDMA mode 3 is ATA33, UDMA mode 4 is ATA66 operation.

 

[AngelOfDeath]

<< ATA/UDMA mode 3 is ATA33, UDMA mode 4 is ATA66 operation >>

Eeeehhmmm, UDMA mode 2 is ATA33 and UDMA4 is ATA66. UDMA5 is ATA100. For some reason they skip a number i.e. 2,4,5. What happended to 3? . Correct me if I'm wrong, but I'm quiet sure that ATA33 is UDMA2.

AoD

 

[LXi]

I think mode3 is ATA33, I remember quite clearly that both mode1 and mode2 are PIOs.

 

[AngelOfDeath]

You have PIO 1 through 4 and UDMA 2 through 5. My Toshiba 1402 is UDMA2, which means it's able to run ATA33 or?!?!. What am I missing here????.

I found this

<< UDMA66: The current standard. Max of 66MB/sec transfer. 80 wire cable required. UDMA33: The previous standard. There are still many new motherboards which only support 33MB/sec max transfer. The vast majority of mobos in the wild will not support more than this. DMA/PIO Mode 4: Pre-UDMA spec which supports a max of 16.7MB/sec >>

Link

And This:

<< The 440BX chipset's PIIX4 is capable of everything up to UDMA-2 or Ultra ATA33 transfers >>

Linkified


AoD

 

[A2KLAU]

This is a confusing topic but I do remember that is says UDMA2 for ATA33 but I could be wrong but I think it is that...

SKY.

 

[oldfart]

UDMA2 = ATA33
UDMA4 = ATA66
UDMA5 = ATA100

UDMA3= ATA44??? j/k

 

[4824guy]

YOu can tell if your HD is working in ata66 mode by benchmarking with HDtach software. The burst rate will be near or over 50's. If it is ata33 mode, it will be alot lower.

THe free download can be gotten at



here

 

[AndyHui]

Ugh...my bad.....ATA33 = UDMA mode 2.

 

[Cybordolphin]

Hmmmmmm..

I see a &quot;transfer mode I/O mode 4&quot;....

Spose that means I am running at ata 66.

Thanks guys.

 

[inqztive]

Okay hope this will put and end to all the disputes about mode 3 or 4 or whatever is the difference between modes for ATA 66 or 33 Etc.

There are 5 different modes in PIO, 0 through 4 with increasing speed as the mode increases. this is supported in old mobos. The next standard is Multiword DMA ( Direct memory access) This has 3 modes 0 through 2. Thne next comes the Faster UDMA i.e Ultra DMA which at present has modes 0 through 5 with

Mode 0=> ATA 33
Mode 1=> ATA 33
Mode 2=> ATA 33
Mode 3=> ATA 66
Mode 4=> ATA 66
Mode 5=> ATA 100

Alothou some modes have the same Maximum data transfer rate with increasing mode the sustained data tranfer rate increses or atleast supposed to increase.
okay now if you see I/O mode 4 that does not mean you are in UDMA mode. Most likely you are in PIO mode 4 wich is much worse. Good hard drives (and mobo) supports UDMA 66 and the latest ones support UDMA 100, which has max rate of 66 MBPS and 100 MBPS data tranfer from the hard drive respectively.

Hope it clears the doubt about mode number and max data transfer rate.

 

[inqztive]

Under win2ks it very easy to check your mode. just right click on my comp..properties... hardware.. device manager.. ide ata/atapi controller and the check the primary and secondary ide channels. It clraly says which mode you are in for all 4 ide channels.

 

[nexialist]

Check your screen during boot up. Mine shows LBA, ATA 100.

Maybe not all bios do.