Not getting sata3 speed in sata3 mobo and HDD setup..

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jayadratha

jayadratha

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Sep 17, 2009
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My processor is i5 3550 and mobo is intel DB75EN.
this mobo has one blue sata port which is capable of sata3 speed. I have a WD 2TB green which is sata3. but getting only 48-50MB/s speed. Is the HDD is like that because it is a green drive or my motherboard's blue port is bad???
my HDD is WD20EARX.. Nowadays I'm getting "disk overload" statement from torrent client frequently. Please tell me if motherboards sata3 controller is bad or not..
 
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When I was using this HDD at sata2 motherboard then also I was getting 40-50MB/s speed. Then what is the difference of sata3 I'm getting?? Is the effect of sata3 is only visible in SSD????
 
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Yes. Only a ssd is fast enough to use the sata3 speed.
 
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I have seen standard 7200 rpm hard drives get 100 MBs but some green drives are 5400 rpm a big difference. Also I have never seen any mobo that has a single SATA 3 port... Is this a DELL I have seen a single blue port in those but it is just to signify this port is for a CD drive not that it is sata 3. If you give us the model of the Motherboard we can get to the bottom of this for you.

Thent
 
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Simple answer yes sata 3 was made for SSD drives hard drives don't come close to max speed of sata 3 but on the other end sata 3 is to slow for high end SSDs notice all high end SSD read write in the 500's never seen a 600 that was not an PCI-e card raid.
 
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This is the link of my motherboard
http://ark.intel.com/products/59043/Intel-Desktop-Board-DB75EN
the HDD is WD20EARX, it is 7200RPM HDD

 
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Well Looks like it really is sata 3 and this is the benchmarks I got off the net for your drive.
Transfer Rate Minimum : 41.9 MB/sec
Transfer Rate Maximum : 107.1 MB/sec
Transfer Rate Average : 86.0 MB/sec
Access Time : 13.8 ms
Burst Rate : 95.2 MB/sec

So ya you are a bit slow. Have you installed the drivers for you motherboard. Open up device manager and see if anything needs drivers. This could make a big diffrence.

Thent
 
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I have checked device manager. There has nothing which requires driver. In the benchmark you have given is the source and destination of write is the same disk??
 
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I do not think your issue is the sata port it is the drive Sata 2 with the overhead subtracted can run close to 300MBs sata 3 twice this or 600MBs so even sata 2 is not slowing your drive down in any way even if it was getting the full 100MBs it should get.

Thent
 
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Intel tells that the blue port i.e the sata3 port have a separate controller(controlling only this port) than the other sata2 ports. Now suppose the port is bad, then is the port can give the 48-50MB/s speed which I'm getting??
 
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No I was thinking that the sata3 port is working bad & so is working as sata2 port.
I did a benchmark using HDTach and the result is given in the link below. Please see this and tell me all are ok or not & is the benchmark for both read & write. I'm really worried that my motherboards sata3 port is bad and working as sata2.

wd20earx.jpg

 
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This looks normal it starts around 110 and tapers off this is not unusual. There is nothing wrong here you are finding something wrong that is not an issue. Like i said your drive will not use all the speed of sata 2 so putting it on sata 3 will not speed anything up.. Just use it nothing is wrong.

thent
 
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But one of my friend is using a 500GB segate and he is getting avg 107MB in HD tach. He is using St3500418as model. this model is sata 2
 
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Yes today I have checked the transfer rate from a usb3 external HDD to my HDD & its avg 90MBps. Which is really good I think..
 
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