Vehicon

I have a Seagate [COLOR=#800080][COLOR=black]Barracuda 7200.9[/COLOR] [/COLOR]HD SATA II. I was wondering y i cant get the full 3GB/sec transfer rate that the drive its self supports. I have an ABIT AW8D mobo, with the latest BIOS. Is there a setting that im missing??

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temeteus82

Well, you cant get that speed from that hard drive. If you did got it windows would not need RAM anymore
anyway the speed of the bus is maximum theoretical speed of the SATAII standard. And the hard drives can't work at that speed. because laws of physics.

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PangingJr

SATA 3Gb/s hard drive and/or SATA 3Gb/s connector (or equivalent to SATA 300 MB/s or sometime known as SATA Generation 2, SATA 2.5 specification. however it's often incorrectly referred to as SATA2 or SATA II) has in theoretical transfer rate of upto 3Gb per second (3Gb/s or 3Gbps or 3Gb/sec) and has the effective maximum throughput of 300MB/s.

Tipstaff

Actually, it's not exactly theoretical, but rather situational. There are 2 reason for this: 1) the drive and controller needs to support all the functions of the standard to be capable of reaching that speed (support for NCQ to name but one feature), and 2) you will only see a difference between 1.5GB/s and 3GB/s transfer rates under certain situations, such as with data burst transfer rates. Servers are also one case where you will see the benifit from it whenever transaction load calls are made for data such as on web or file servers. In real world use though, you will not see the difference in speed... at least nothing significant. Sometimes you may even see a small decrease (which, btw, you can thank NCQ for that). Again, it all depends on the situation.

BTW, (edit: LOL.. and you beat me to it Panging.. LOL ) it should be pointed out that SATA-II is not senonomous with 3GB/s. SATA-II is infact the name of the organization that came up with, or rather finalized the specifications for SATA-II of which 3GB/s was part of that spec (and as a way to stop that confusion they changed their name to the SATA International Organization, or SATA-IO). While the SATA-II monicker is being used as a way to promote manufacturers drives, touting them as being SATA-II "compatible", you should remember that it doesn't necessarily mean they actually support all of the SATA-IIs finalized specs. For instance, some say they support SATA-II, but don't support NCQ. As a matter of fact, WDs own WDxxxJS and WDxxxKS series of SATA-II compatible drives don't support NCQ.

Just thought I'd clear that up.

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temeteus82

Thanks Tipstaff to clearing that

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PangingJr

What is SATA 3Gb/s?
by the SATA-IO (Serial ATA International Organization) itself - http://www.sata-io.org/3g.asp

Tipstaff

.

The 2nd last paragraph pretty much sums it all up (and more neatly than I explained it btw).

Good read too.

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