What is the difference between SATA II and SATA 2.5?

[AsymF]

I have been looking at a Seagate Barracuda 7200.9 and the product is
shown
to use the SATA 2.5 rev. specification. I am looking for an SATA II
drive with NCQ that will work with my nForce4 motherboard that supports
SATA II and NCQ.

This is the drive I am talking about:
http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=101541

Anyone know whether the SATA 2.5 spec will work with the 9NPA nForce 4
Ultra motherboard? I already have a DiamondMax 10 connected and am
looking to buy another drive to back it up on when needed.

 

[Marc]

I have been looking at a Seagate Barracuda 7200.9 and the product is
shown
to use the SATA 2.5 rev. specification. I am looking for an SATA II
drive with NCQ that will work with my nForce4 motherboard that supports
SATA II and NCQ.

This is the drive I am talking about:
http://www.zipzoomfly.com/jsp/ProductDetail.jsp?ProductCode=101541

Anyone know whether the SATA 2.5 spec will work with the 9NPA nForce 4
Ultra motherboard? I already have a DiamondMax 10 connected and am
looking to buy another drive to back it up on when needed.

SATA II is a group of people who came up with new technologies for SATA
disks, SATA 2,5 is a name for some of those technologies.

Marc

 

[AsymF]

Can an SATA 2.5 compatible drive be used on a motherboard that supports
SATA and SATA II?

 

[Mike Walsh]

Yes.

Can an SATA 2.5 compatible drive be used on a motherboard that supports
SATA and SATA II?

 

[Paul]

Yes.

From the press release about "SATA 2.5 standard":

http://www.serialata.org/docs/SATA_Rev2.5_Spec.pdf

"August 23, 2005 ­ Serial ATA International Organization
(SATA-IO), the consortium dedicated to sustaining the quality,
integrity and dissemination of SATA technology, today announced
the completion of the SATA Revision 2.5 specification. SATA
Revision 2.5 is a consolidated, integrated spec that includes
the 3Gb/s feature, as well as other features like Native Command
Queuing (NCQ), Staggered Spin-up, Hot Plug, Port Multiplier and
eSATA. It also incorporates resolutions to all errata accumulated
to-date."

In other words, to further confuse their bungled handling of the
SATA spec to date, they decided to release another revision
of their spec (and collect fees from people who need to download
the spec). The feature list in that press release is not suggestive
that anything has been added.

I would continue to concentrate on the feature list, as provided
by the manufacturer. So if NCQ is mentioned, or 3.0Gbit/sec I/O,
those are your features for better or worse.

Nforce 4 Tech Specs - Only mentions 3Gbit/sec I/O:

http://www.nvidia.com/page/pg_20041015990644.html

NCQ is mentioned here:

http://www.nvidia.com/object/IO_16449.html ==> which returns the file...
TB-01760-001_v02_MediaShield_090805.pdf

HTH,
Paul