SATA 150 over SATA II

Hi,

i had an arguement with the other tech here at work on this little situation.


here it is, at the moment i've got 2 x 120gb seagate 7200.7 drives striped.

I'm upgrading these drives too, 2 x 160gb WD SATA II. (keep in mind my controller is only sata 150mbps)

now i was saying, i will notice a performance increase, not by alot but i will notice an increase due to the fact that these ARE SATA II. My main point &/or theory is that because the WD drives can run at 300mbps, and the Seagate drives can only run at 150mbps.. the 'average' speed of the WD's will be faster then the Seagate drives.

I know there is a bottleneck from the sata controller from m/b to hdd - but when i run the sata 150 drives, NOTHING EVER runs at it's full speed... correct? and i am currently only using 70MB/S of my bandwith - because of variables etc etc.. But because the WD drives can run at 300mbps, the average speed of these drives is going to be faster because there is more leway on the variables. correct?

to put it in a nutshell, the WD will run faster then the Seagate's because there is a wider bandwith pipe.. so to say. I know the drives won't run at 300mbps, but i am expecting the drives to be considerably faster then my current seagate drives.


My work tech has 2 x 32gb raptor drives, and he can easily get 90-100MB/s through them, i'm expecting the same but without the 10,000rpm motor



now, tell me if my theory is flawed.

(If your confused, i'll try to explain it better)

 

To clarify, Sata 150mbps avg 75, Sata II 300mbps avg 150. This is true, but what realy makes a difference these days is the seek and write speed of the drives, is what really makes a difference, regardless of avg and max through-put. The WD raptor is still the king when it comes to speed, their are numerous reviews online comparing the lastest Sata II drives and always against the Raptor, nothing in any raid config has taken the crown yet.

Far as Sata I & II go, the industry never pushed Sata I to it's full potential and Sata II is a long way from from being fully utilized. I'd like to think WD is working on a Raptor with Sata II, that would be impressive.

Also, I'm not sure what effect using a sata II on a sata I controller would have, or even if it would work. You can usualy go backwards compatible with controllers but not forward, which would be what you are trying to accomplish.

 

Yeah, the Raptor is probably still going to be a bit faster.

Also, you may want to just ditch the RAID-0. There really is no improvement in loading times, or other real world situations. Save yourself the effort. And, if one drive fails, you won't lose the data on the other one.

http://www.anandtech.com/storage/showdoc.aspx?i=2101

 

Well, a little skewed. But, if one were to do major video editing, or other items as such, raid 0 would be fine. Not for storage!!!!

For casual booting of windows, installing and running games. RAID is useless.

 

I must disagree, I don't have a stopwatch or a bench mark to prove it but my system got noticably faster when I went to a raid 0 config. I think it made allot of difference.