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SATA 3.0 Useless?

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hash   07-02-2009 at 02:38:40 PM

Hi,




So I just realized that my Seagate Barracuda 7200.10 had a jumper setting so that if I remove the jumper I can use it at SATA 3.0 standards . But I saw no difference in the benchmark from HDTune.


When I was using SATA 1.5 the read was 75 mb/s and after I changed to SATA 3.0 the read speed is the same 75 mb/s . And I neither felt or saw even the slightest difference and yes my MOBO supports SATA 3.0!

So, what really does this SATA 3.0 do over the SATA 1.5?

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klsdivan   07-02-2009 at 03:54:59 PM
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It is SATA 3Gbit/s and 1.5Gbit/s so it will allow information to move between the hard drive and the motherboard quicker. But as im guessing the max read on your hard drive is 75mb/s then the speed it connects with will not matter as it is below the 1.5Gbit/s.

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505090   07-03-2009 at 01:41:55 AM
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depends on what drive you hook up to it

Doesn't matter if your racing in the salt flats if your driving a yugo

------------------------------ E8400 : GA-EP35-DS3L : mushkin 4GB DDR2 800 : HD 2600PRO : 450W ATX12V : Windows 7
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hash   07-03-2009 at 07:09:47 AM
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Quote :

depends on what drive you hook up to it



I don't get what your saying. What do you mean by that? And what kind of hard drives will use 3gbit? Does it depend on the RPM of the spindle. And what's the use of my Seagate barracuda offering me a 3gbit jumper setting when it cannot even perform at that speed?

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505090   07-03-2009 at 07:41:24 AM
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I meant that different drives read at different speeds. Traditional drives peak at about 100; ssds peak around 220.

Current top end ssd drives already exceed standard sata bandwidth.

The rpm of the spindle has more to do access times than throughput.

As far as the jumper it is most likely there for compatibility issues. Also in addition to the increased bandwidth I would assume there are more features in the sata standard.

------------------------------ E8400 : GA-EP35-DS3L : mushkin 4GB DDR2 800 : HD 2600PRO : 450W ATX12V : Windows 7
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royalcrown   07-03-2009 at 08:04:01 AM
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What it means is the speed to and from the CACHE on your drive. It IS indeed twice as fast, but then once the 8 0r 16 or 32 meg buffer is emptied (.1 seconds roughly for a 32 meg buffer, or .05 for a 16 meg buffer) the information can only come off the hardrive as fast as it can be read from the platters.

The buffer or CACHE can only write to the hard drive as fast as the mechanical portion can write.

Look at it like this, get in your car for a 2 mile trip, drive a quarter mile at 180 mph and after that the other 1.75 miles at 60 mph. guess what your overall time is almost the same as if you just drove 60 the whole time.

------------------------------ E8500,GA-EP45-UD3R, 8 GIG MUSHKIN, XFX 4890 , ASUS 22", WD 640 X 2, CM 532, CM 650TX
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royalcrown   07-03-2009 at 08:05:28 AM
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klsdivan wrote :

It is SATA 3Gbit/s and 1.5Gbit/s so it will allow information to move between the hard drive and the motherboard quicker. But as im guessing the max read on your hard drive is 75mb/s then the speed it connects with will not matter as it is below the 1.5Gbit/s.



yes, it's the speed between the motherboard and the cache on the drive.

------------------------------ E8500,GA-EP45-UD3R, 8 GIG MUSHKIN, XFX 4890 , ASUS 22", WD 640 X 2, CM 532, CM 650TX
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pat   07-03-2009 at 03:05:26 PM
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It is interface speed. Not drive speed. It means the the 3.0 interface has twice the bandwidth of the 1.5 interface. Solid State drive, which are in fact hard drive with memory module instead of mechanic, platter and head, will saturate easily the 1.5 bandwidth, and will saturate the 3.0 bandwidth. But in no way standard mechanic drive will saturate the interface, even the 1.5.

The exception being readind from cache. Cache is memory on the drive, not limited in speed by the mechanical component. But cache is so small that is don't affect much the day to day operation.

What the newer sata interface brought is more feature, like hotswap, ncq,... But as ong as drive won't become really faster, the speed will not really be affected.

running on a highway don't make you running faster than on the sidewalk..

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505090   07-03-2009 at 08:11:40 PM
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pat wrote :



What the newer sata interface brought is more feature, like hotswap, ncq,..



wasn't that sata 2

------------------------------ E8400 : GA-EP35-DS3L : mushkin 4GB DDR2 800 : HD 2600PRO : 450W ATX12V : Windows 7
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pat   07-03-2009 at 09:34:50 PM
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sata 2 doesn't exist officially, the real name is sata 3.0 Gb/s. The sata3 (third generation) will be SATA6.0 Gb/s


Message edited by pat on 07-03-2009 at 09:41:19 PM
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Bronze Storage badge sub mesa   07-04-2009 at 03:24:09 PM
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No power on the SATA connectors yet, a missed chance! Especially with SSDs requiring 0.01 - 0.5W power, this would have been a great opportunity IMO.

------------------------------ ...man will occasionally stumble over the truth, but usually manages to pick himself up, walk over or around it, and carry on.
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xtc28   07-05-2009 at 09:53:25 PM
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^would have been nice

------------------------------ AMD, INTEL, ATI, NVIDIA. IT DONT MATTER. THEY ARE ALL GOOD JUST GET MORE.
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