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Subject: Re: promise sx8 sata driver

From: Kallol Biswas <kallol@nucleodyne.com>
Reply-To: kallol@nucleodyne.com
To: Jeff Garzik <jgarzik@pobox.com>
Cc: Chris Haumesser <chris@mail-test.us>,
	linux-kernel@vger.kernel.org
In-Reply-To: <42925F7F.2000809@pobox.com>

References: <42924E38.7070003@mail-test.us>  <42925F7F.2000809@pobox.com>

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Organization: NucleoDyne Systems Inc.

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Date:	23 May 2005 23:16:03 -0700

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How good is 2.6.6 carmel.c driver for sx8 adapters? Does it support
the promise adapter? Why have you developed sx8.c?
 

On Mon, 2005-05-23 at 15:55, Jeff Garzik wrote:
> Chris Haumesser wrote:
> > The sx8 driver does not use libata, and it is a separate block device,
> > outside of the scsi and ata hierarchies.  If I compile the driver into
> > my kernel, I end up with /dev/sx8/0 and /dev/sx8/0p1, etc.  However, no
> > scsi disk devices are created, and grub does not recognize that
> > /dev/sx8/ devices are disks.  There's no indication in /proc/scsi/ that
> > they are being registered with the scsi subsystem; this is clearly
> > different from every other sata controller I've used.  I've been
> > googling this for days, with no real luck.  I have found changelogs for
> > grub that suggest that my version (0.95) should support booting from the
> > sx8.
> 
> sx8 is a separate block driver, and has nothing whatsoever to do with scsi.
> 
> 
> > So my question is, how does one use this driver for sata disks?  Is my
> > problem a grub problem, or does it have something to do with the fact
> 
> a grub problem
> 
> 
> > What is the relationship between the promise driver and the one included
> > in the kernel?  Why does one work differently from the other?  Is there
> 
> Promise SX8 provides neither an ATA nor SCSI interface to the developer, 
> so its not written as an ATA or SCSI driver.
> 
> 	Jeff
> 
> 
> -
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