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Can a HDD take advantage of SATA 3?

post #1 of 7
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Just like the title says, can a 7200 RPM HDD take advantage of SATA 3 and its faster speeds, or would a SATA 2 HDD be just fine?
Deauboy16
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Deauboy16
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post #2 of 7
Quote:
Originally Posted by deauboy16 View Post

Just like the title says, can a 7200 RPM HDD take advantage of SATA 3 and its faster speeds, or would a SATA 2 HDD be just fine?

Sata 3 hdd is a marketing gimmick. Just get an hdd that you need space wise.
    
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post #3 of 7
SATA 3 can only truly be used in a large raid setup. SATA 2 = SATA 3 for individual HDD's.
You'd probably have to have at least 4 drives in raid 0 to be able to use SATA 3 speeds. Even then, what would be the point? =P
    
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post #4 of 7
for mech drives more a gimmiic and even in a 3 or 4 drive RAID 0 array it would be questionable as the speed of RAID 0 = x # drives is thoeritcal at best as the amount of drives increases thumb.gif
 
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post #5 of 7
Quote:
Originally Posted by Jaguarbamf View Post

SATA 3 can only truly be used in a large raid setup. SATA 2 = SATA 3 for individual HDD's.
You'd probably have to have at least 4 drives in raid 0 to be able to use SATA 3 speeds. Even then, what would be the point? =P

A single spindle disk hard drive will never approach sata 3 speeds. The drives that state they are Sata 3 have contollers that support Sata 3, but the disk will not actually support it. If you put multiple drives in a Raid 0 array, you may get Sata 3 speeds, but no single drive would ever utilize enough speed to saturate a Sata 2 port, so 3 is worthless unless you are using SSDs.
post #6 of 7
Each drive has its own channel (even in RAID), so if you wanted to RAID-0 six 150MB/sec drives together, SATA2 would be fine.

SATA3 isn't really a manufacturer marketing gimmick. They're advancing the tech before it becomes a problem. smile.gif (And at no cost to you - SATA3 drives came onto the market cheaper than SATA2 ones... though what retailers do is up to them.)

SATA3 is already a tiny bit useful on some of the higher end drives like the Hitachi 7K1000.D - with sequential speeds around 175MB/sec and burst speeds around 350MB/sec, every once and a while it'll improve performance by as much as 2%! tongue.gif

But hey, 2 years from now it'll be way more useful. By then every HDD will be pushing the limits of SATA2. And a 550MB/sec SATA3 SSD will be "slow" wink.gif

I kinda like SATA3 just for writes. A SATA3 HDD can accept data into cache a bit faster. A difference of ~2-5ms doesn't seem huge, but when gaming and multitasking it could be the difference between a stutter or no stutter. Losing a frame or not. (or losing 3 frames rather than 4, etc.) Any which way, it's not something that'll show up in most benchmarks.
Edited by Kramy - 2/26/12 at 6:38pm
     
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post #7 of 7
Thread Starter 
Thanks for all the help! I already have SSD's so it would just be for my storage HDD's so I guess I will get what ever size drive i need that is cheaper and will not look at the SATA II or SATA III differences. Thanks again!
Deauboy16
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Deauboy16
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