ATA 100 & ATA 133 mixed

  • Thread starter Thread starter Ed.
  • Start date Start date
E

Ed.

If I have two drives both connected to the primary IDE controller and have
one that is an ATA/133 and it is as Master and the other is an ATA/100 and
it is as Slave, will they both run at their own speed?

In other words will the 133 be at 133 and the 100 at 100?
I know that when transferring data between the two that the transfer will be
at the lowest speed but does this also mean that when not transferring data
that the 133 will always be running at 100 instead of 133?

Thanks,
Ed.
 
My understanding is that the speed on the cable is always the slowest common
speed for devices on same cable....


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Hi

If your mobo support ATA133, boot into BIOS and check for the transfer mode for the Primary IDE channel
It should be UDMA mode 6 for the master Hdd and UDMA mode 5 for the slave drive
Go to device manager, click the IDE ATA/ATAPI controllers, right click on Primary IDE Channel/properties/advanced Settings, view the current transfer mode for Device 0 and Device 1
If both are DMA mode 5, that means the master Hdd is just running at ATA100 instead of ATA133

By using a 40 Pin 80 conductors shielded cable, the fastest drive should always be connected to the master so as to obtain the fastest transfer rate. So, if your mobo support ATA133, it should show UDMA 6 for Device 0 and UDMA 5 for Device 1 in the device manager

Pete


----- Ed. wrote: ----

If I have two drives both connected to the primary IDE controller and hav
one that is an ATA/133 and it is as Master and the other is an ATA/100 an
it is as Slave, will they both run at their own speed

In other words will the 133 be at 133 and the 100 at 100
I know that when transferring data between the two that the transfer will b
at the lowest speed but does this also mean that when not transferring dat
that the 133 will always be running at 100 instead of 133

Thanks
Ed
 
Yes, it does show UDMA 6 for Device 0 and UDMA 5 for Device 1 in the device
manager as you said. That is what I wanted to know. I had heard before that
they both would be 100 and operate at that speed and never really was able
to find out for sure.

Thank you and the others that have replied.

Peter said:
Hi,

If your mobo support ATA133, boot into BIOS and check for the transfer
Click to expand...
mode for the Primary IDE channel.
It should be UDMA mode 6 for the master Hdd and UDMA mode 5 for the slave drive.
Go to device manager, click the IDE ATA/ATAPI controllers, right click on
Click to expand...
Primary IDE Channel/properties/advanced Settings, view the current transfer
mode for Device 0 and Device 1.
If both are DMA mode 5, that means the master Hdd is just running at ATA100 instead of ATA133.

By using a 40 Pin 80 conductors shielded cable, the fastest drive should
Click to expand...
always be connected to the master so as to obtain the fastest transfer rate.
So, if your mobo support ATA133, it should show UDMA 6 for Device 0 and
UDMA 5 for Device 1 in the device manager.
 
"JEM" said in news:[email protected]:
no, they will run at the slower speed...
Click to expand...

Only for really old motherboards whose IDE controllers do not support
independent timing. That would probably date the motherboard around
1997 or earlier. The Intel 440BX chipset supported independent timing.
I just got rid of my last 440BX computer and it was almost 4 years old.
I think the 440BX got released around late 1997. Only until recently,
and after I had just gotten rid of the 440BX box, did I even bother to
check it out at Intel (mostly you have to review what the southbridge
does since that's where is the IDE controller circuitry). I doubt it
was the first chipset that support independent timing of the IDE
channels. Other users have remarked that independent timing has been
available since 1994.

Independent timing (i.e., supporting multiple concurrent ATA modes) has
been around for awhile.
 
Ed. said:
If I have two drives both connected to the primary IDE controller and have
one that is an ATA/133 and it is as Master and the other is an ATA/100 and
it is as Slave, will they both run at their own speed?

In other words will the 133 be at 133 and the 100 at 100?
Click to expand...

Yes. The old type of controller that did not do this would not handle
these speeds anyway
 
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