Re: ATA Pass-Through support

Re: ATA Pass-Through support

[Jeff Garzik]

Quat Le wrote:
> Does anyone know of any SAS HBA vendor whose driver either uses libata
> or supports SATA Pass-Through SCSI commands in their own layer? 

Brian King, maintainer of the ipr driver, has posted patches which 
integrate libata SATA support into his driver.  Merging those is on my 
todo list, though I'm currently waiting on Tejun Heo's error handling 
work before tackling that (and NCQ and hotplug...).

	Jeff

RE: ATA Pass-Through support

[Quat Le]

> -----Original Message-----
> From: Jeff Garzik [mailto:jgarzik@pobox.com]
> Sent: Thursday, March 02, 2006 10:17 AM
> To: Quat Le
> Cc: Moore, Eric; dougg@torque.net; linux-scsi@vger.kernel.org; Brian
King;
> linux-ide@vger.kernel.org
> Subject: Re: ATA Pass-Through support
> 
> Brian King, maintainer of the ipr driver, has posted patches which
> integrate libata SATA support into his driver.  Merging those is on my
> todo list, though I'm currently waiting on Tejun Heo's error handling
> work before tackling that (and NCQ and hotplug...).
> 
> 	Jeff
>

Jeff,
I'm not familiar with the ipr driver. Is this for IBM PowerPC RAID? How
will this work for me? I don't really need RAID. What I have is a
Pentium-based machine.  I want to be able to talk to SATA drives on a
SAS expander.
 

Re: ATA Pass-Through support

[Brian King]

Quat Le wrote:
> I'm not familiar with the ipr driver. Is this for IBM PowerPC RAID? How
> will this work for me? I don't really need RAID. What I have is a
> Pentium-based machine.  I want to be able to talk to SATA drives on a
> SAS expander.

There is really two parts to my patchset. One is some general libata changes
needed for any SAS HBA that wants to use libata to attach SATA devices, and
the second part is the changes to ipr to use that function.

Doug had mentioned a while back that he might look into using libata to attach
SATA devices to aic94xx adapters. Doug, are you still planning to look
at this, or is someone else working on this?

-- 
Brian King
eServer Storage I/O
IBM Linux Technology Center

Re: ATA Pass-Through support

[Brian King]

Jeff Garzik wrote:
> Quat Le wrote:
>> Does anyone know of any SAS HBA vendor whose driver either uses libata
>> or supports SATA Pass-Through SCSI commands in their own layer? 
> 
> Brian King, maintainer of the ipr driver, has posted patches which 
> integrate libata SATA support into his driver.  Merging those is on my 
> todo list, though I'm currently waiting on Tejun Heo's error handling 
> work before tackling that (and NCQ and hotplug...).

Tejen,

Is there anything I can do to help with the error handling work Jeff
is referring to?

Brian

-- 
Brian King
eServer Storage I/O
IBM Linux Technology Center

Re: ATA Pass-Through support

[Tejun Heo]

On Fri, Mar 03, 2006 at 10:50:13AM -0600, Brian King wrote:
> Jeff Garzik wrote:
> >Quat Le wrote:
> >>Does anyone know of any SAS HBA vendor whose driver either uses libata
> >>or supports SATA Pass-Through SCSI commands in their own layer? 
> >
> >Brian King, maintainer of the ipr driver, has posted patches which 
> >integrate libata SATA support into his driver.  Merging those is on my 
> >todo list, though I'm currently waiting on Tejun Heo's error handling 
> >work before tackling that (and NCQ and hotplug...).
> 
> Tejen,
> 
> Is there anything I can do to help with the error handling work Jeff
> is referring to?
> 

Hello, Brian.

The EH work is in the process of being merged into libata-dev
#upstream branch.  The merge process has slowed down a bit lately due
to bug fixes for 2.6.16 but it's still progressing pretty fast.  I
think/hope whole EH stuff can be merged during 2.6.17 process or
post-2.6.17 #upstream.  It shouldn't take too long.  We're just two or
three patchsets away (and all changes are living in my repository
happily although they are a bit rough).  So, please give it a few more
weeks.  We will be there.

Thanks.

-- 
tejun