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Rokeneer

macrumors regular
Original poster
Sep 27, 2011
119
0
What is the difference between SATA and SATA 2?

Will both work in my 2006 Mac Pro?
 

Intell

macrumors P6
Jan 24, 2010
18,912
433
Inside
About 1.5Gbit/sec speed. They will both work in your Mac Pro, but try to get SATA 2 drives, they're faster.
 
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derbothaus

macrumors 601
Jul 17, 2010
4,092
30
SATAI = 1.5Gb/s
SATAII = 3.0Gb/s
SATAIII = 6.0Gb/s

A single HDD can't get to 150MB/s sustained yet. SSD's can saturate their respective links.
 
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jmcgeejr

macrumors 6502
Oct 7, 2010
461
7
Seattle, WA
SATAI = 1.5Gb/s
SATAII = 3.0Gb/s
SATAIII = 6.0Gb/s

A single HDD can't get to 150MB/s sustained yet. SSD's can saturate their respective links.

As stated above.
An ssd can saturate a SATA2 connection and below easily as Sata2 is 3Gbps which is roughly 375MB/s. No single mechanical drive can saturate a single bus right now, nor can I see that changing in the near future.
 
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derbothaus

macrumors 601
Jul 17, 2010
4,092
30
As stated above.
An ssd can saturate a SATA2 connection and below easily as Sata2 is 3Gbps which is roughly 375MB/s. No single mechanical drive can saturate a single bus right now, nor can I see that changing in the near future.

And also adding a Sandforce SATAIII SSD can saturate a 6.0Gb single bus. 560MB/s is pretty close to full saturation forgiving any overhead.
 
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jmcgeejr

macrumors 6502
Oct 7, 2010
461
7
Seattle, WA
And also adding a Sandforce SATAIII SSD can saturate a 6.0Gb single bus. 560MB/s is pretty close to full saturation forgiving any overhead.

I am going to disagree on that one :), since sata 3 is 6Gbps which is about 750MB/s, and from reading, the overhead is about 10% at worse so 7MB/s :)
 
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derbothaus

macrumors 601
Jul 17, 2010
4,092
30
I am going to disagree on that one :), since sata 3 is 6Gbps which is about 750MB/s, and from reading, the overhead is about 10% at worse so 7MB/s :)

True man. Can't argue with correct math. But with 10% overhead (worse case) theoretical is maxed at 691MB/s. So we have a good 140MB/s to go:D
 
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