Re: SATA RAID (aacraid/3w-9000) NCQ/TCQ support

[Brian Long <brilong cisco com>]

On Wed, 2005-09-28 at 15:55 -0400, Ken Snider wrote:
> I'm just speccing out a new data storage solution, and am working to ensure 
> the SATA drives that will be included all support NCQ/TCQ (two TCQ-aware 
> raptors, 10-14 NCQ-aware WD or Seagate disks).
> 
> What I need to know, however, is driver support. Do either of these card 
> drivers yet support NCQ/TCQ?
> 
> Thanks in advance for any insight anyone may have.

I would recommend you read this:
http://linux.yyz.us/sata/

In particular, you might find this document answers your questions:
http://linux.yyz.us/sata/sata-status.html

This lists each driver and what portions of SATA (and SATA-II) are
supported.  As you can see, most of the drivers do not yet support the
SATA-II functionality like NCQ and TCQ  :(

The Si3124 seems to be an interesting choice:
http://www.siliconimage.com/news/press/detailpressrelease.aspx?id=197

I just bought an Nforce 4 Ultra-based m/b for home.  Works well with FC4
and my Samsung Spinpoint SATA-II drives, but I don't believe it's using
NCQ or TCQ.

/Brian/
-- 
       Brian Long                      |         |           |
       IT Data Center Systems          |       .|||.       .|||.
       Cisco Linux Developer           |   ..:|||||||:...:|||||||:..
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