Re: [PATCH] scsi: Update Aic94xx SAS/SATA Linux open source device

[Gilbert Wu <Gilbert_Wu@adaptec.com>]

On Fri, 2007-08-31 at 17:31 -0400, Douglas Gilbert wrote:
> Gilbert Wu wrote:
> > Subject:  [PATCH] scsi: Update Aic94xx SAS/SATA Linux open source device
> > driver to fix smartctl utility problem.
> > 
> > Contribution:
> >    Gilbert Wu <gilbert_wu@adaptec.com>
> > 
> > Change Log:
> > 
> > 
> > 1. Fixed the problem that "smartctl -a /dev/some_sata_disk -d ata"
> >    does not work on aic94xx device drive with SATA devices.
> >    The smartctl utility send down ATA smart command to aic94xx
> >    driver and fail to get the result which is stored on ATA output
> >    register. 
> >    In normal case, Aic94xx’s firmware does not return the value of
> >    ATA output register to device driver due to performance reason.
> >    To solve this issue then the driver need to turn on internal
> >    flag (CSMI_TASK) for particular ATA command to enable firmware
> >    to return the value of ATA output register.
> 
> Recent versions of smartmontools (say 5.38 from CVS at
> sourceforge) don't need the '-d ata' option any more.
> 
> If smartctl or smartd see /dev/sd<x> in Linux, they will
> assume a SCSI disk, do an INQUIRY and if they see
> "ATA     " in the T10 vendor identification field then an
> ATA (most likely SATA) disk is assumed behind a SAT layer.
> Thereafter ATA commands will be issued, each wrapped in
> a SCSI ATA PASS-THROUGH(16) command.
> 
> Perhaps you might check that this works with the aic94xx
> driver. [It does work with MPT SAS HBAs.]
> 
> Doug Gilbert

The smartctl-5.38 works fine with aic94xx after fixed the ATA register
output problem. I also verify it by adding debug message that
smartctl-5.8 utility sends ATA smart command to aic94xx driver with SATA
device.

Thanks!
Gilbert
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