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Seriel ATA question

Sunny129

Sunny129

Diamond Member
I just started using an Abit IT7 max2 v.2 mobo that i had laying around b/c my old one crapped out on me. It has two serial connectors that i'm curious about. Now i know how to hook a parallel drive up via the serillel adapter, but i'm unsure about the channel the device operates on. Are SATA devices operating on their own channel, or are they still operating on an IDE channel through a different interface (serial instead of parallel)? And if they are operating on an IDE channel, which one is it on? I want to know b/c if SATA devices operate on its own channel, then i can hook up my HDD so that it is a device on its own channel, and not sharing w/ a zip drive or a CD-RW. Thanks, Eric...
 
I believe they operate through the pci bus, rather than the ide channels. It won't be sharing bandwidth with your zip drive or cd-rw, but with anything you have installed in a pci slot. 865/875 boards have native sata in the southbridge, so for those chipsets, they are not sharing bandwidth with any other devices.
 
Dude, don't worry about it. It doesn't matter. How much bandwidth do you think a cd-rw can suck down anyway? I've always been under the impression that each IDE connector has a point-to-point connection with the chipset.

It could be different for every chipset but the kt400a seems to have them on their own channel apparently.
http://www.anandtech.com/chipsets/showdoc.html?i=1796&p=3

No MB operates SATA or PATA on the pci bus.
 
Originally posted by: Sunny129
... Are SATA devices operating on their own channel, or are they still operating on an IDE channel through a different interface (serial instead of parallel)? And if they are operating on an IDE channel, which one is it on? I want to know b/c if SATA devices operate on its own channel, then i can hook up my HDD so that it is a device on its own channel, and not sharing w/ a zip drive or a CD-RW. Thanks, Eric...
Click to expand...

I have used that motherboard before, but it has been a while... The i845PE chipset didn't support native SATA, so it isn't coming off of an IDE channel or the southbridge for that matter. The controller chips for Serial ATA are to the right of the RAID controller chip and situated between IDE4 and IDE 3. Each Serial ATA controller chip is right above its respective Serial ATA port. I am pretty sure that these two chips bridge (host mode) over to the HighPoint HPT374. This means that the actual bandwidth for any Serial ATA device you have is limited to ATA/133 because it is bridged. Anyways, you won't notice much of anything in terms of performance until the software catches up.
 
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