SATA III 6Bb/s on Mac Pro

Hello,

i'm wondering if the new SATA III Drives are compatible with the Early 2009 Mac Pro .A 6Gb SATA will operate at 6 or 3GB/s speed?

Mac Pro 2.66. Quad Core, Mac OS X (10.6.4)

Posted on Aug 17, 2010 4:09 AM

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13 replies

Nov 20, 2010 4:38 PM in response to docchang

No. A good example is the 6Gb/s Crucial C300 SSD. It has a read speed of 350MB/s on a 6Gb/s host adapter. But on the built-in 3Gb/s SATA interface (like the Mac Pro internal and MacBook Pro internal), the read speed drops to 270MB/s -- or no faster than the fastest 3Gb/s SSD. The write speed never gets over 230MB/s on either interface.

As for 6Gb/s PCIe SATA III host adapters, the two port variety is has good read speeds but the write speeds are subpar. The only 6Gb/s host adapter I've seen with a fast read and write speed is the ATTO ExpressSAS R680 adapter. With that card and an external SAS/SATA enclosure from Raidon/Stardom (ST8-U5), I measured 806MB/s with 4 SSDs and 1503MB/s with 8 SSDs.

Nov 21, 2010 10:00 AM in response to rob_ART

... and what happens when I put two C300 in a brand new Mac Pro 2010 and combine them in a RAID 0 with the hard drive utility? Will this be faster than a single C300?

Is the overall speed/throuput then about 2 times the max. speed of SATA II? Can I calculate it like this?

Maybe this is a rather stupid question.

Cheers,

Chris

Message was edited by: ix400

Message was edited by: ix400

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SATA III 6Bb/s on Mac Pro

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