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SATA Configuration and Intel Rapid Storage Technology

Last response: in Storage
August 2, 2011 9:13:42 PM

I have the following configuration:
Motherboard: ASUS P5K Premium
PSU: Cooler Master Silent Pro M 600W
HDD0: WD 1002FAEX aka Caviar Black 1TB
HDD1: WD 2002FYPS aka RE4-GP
The other components I think are irrelevant.

So I have installed Intel Rapid Storage Technology Drivers/Manager.
In the advanced section it says:

SATA Transfer rate: 1.5 Gb/s for HDD0
SATA Transfer rate: 1.5 Gb/s for HDD1

BIOS is set to AHCI.

The question: Why is that? HDD0 is SATA 6.0 Gb/s and HDD1 is SATA 3.0 Gb/s but both get reported as SATA 1.5 Gb/s. The motherboard supports SATA 3.0 Gb/s.

August 3, 2011 9:27:50 PM

Any ideas?
a b V Motherboard
a c 542 G Storage
August 3, 2011 10:44:55 PM

The maximum transfer rate of a SATA II port is 3.0 Gb/s which is = 300 MB/s.
The maximum transfer rate of a SATA III port is 6.0 Gb/s which is = 600 MB/s.

The maximum transfer rate of the WD1002FAEX is 126 MB/s.
126 MB/s is close to 150 MB/s, which is why you see Intel RST report 1.5 Gb/s.

Hard drives that are labeled as SATA III is mostly marketing bs. Single SATA III hard drives cannot spin fast enough to even saturate a SATA II port.

You need 4 or more SATA III hard drives in RAID to see SATA III performance.

Related resources
a b V Motherboard
August 3, 2011 11:20:18 PM

^ +5 to dereck, took the words outta my mouth :) 

You need 4 or more SATA III hard drives in RAID to see SATA III performance.
or drop a truck load of money on SSD's to see them touch that speed.
August 4, 2011 8:29:32 AM

So it is not reporting the technology but the real HDD speed?
a c 107 V Motherboard
August 4, 2011 9:21:44 AM

Something's not right in your setup. It should be reporting the interface connection speed, not the maximum speed of your drives. Whether your hard drives can transfer at the full speed is irrelevant -- it should still display the interface correctly in the manager.

I have a SATA2 boot SSD and SATA2 data platter drive. Both display as 3.0 Gbps drives in the manager. Yours should display as 6.0 Gbps for one and 3.0 Gbps for the other.
August 4, 2011 12:13:24 PM

I figured something is wrong, but what?

Funny thing is that the first time I started Intel Rapid Storage Tech HDD1 was reported as 3.0 Gb/s.
August 7, 2011 7:53:54 PM

Somebody? Maybe the problem is in a faulty controller on the motherboard?