Re: SCSITaskDevice vs our own driver

[Ken Thomases]

On Oct 16, 2009, at 6:01 PM, Charles Davis wrote:
> Eventually, I want to implement IOCTL_SCSI_PASS_THOROUGH on Mac OS.  
> The
> way I see it, there are two ways to do this:
> - Use the SCSITaskDevice interface. This is a CFPlugIn object
>
> provided
> by the driver (it's like a COM object). We have to get exclusive  
> access
> (this requires all the handles to all device files to be closed, and  
> the
> disk unmounted), and then we can send whatever SCSI commands we like.

I don't believe that's correct:
http://developer.apple.com/mac/library/qa/qa2001/qa1179.html

Mac OS X specifically does not support SCSI pass-through for storage  
devices.

-Ken