Date: Tue, 13 Mar 2001 22:34:03 -0600 From: David Kelly <dkelly@hiwaay.net> To: Mike Meyer <mwm@mired.org> Cc: questions@freebsd.org Subject: Re: FreeBSD and Linux (More Questions!) Message-ID: <200103140434.f2E4Y3e16556@grumpy.dyndns.org> In-Reply-To: Message from Mike Meyer <mwm@mired.org> of "Mon, 12 Mar 2001 22:29:25 CST." <15021.41509.272331.128233@guru.mired.org>
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Mike Meyer writes: > David Kelly <dkelly@grumpy.dyndns.org> types: > > Believe Soren has put everything in the FreeBSD kernel for such in the > > ATA driver. Only waiting on somebody to customize the popular utilties > > (such as cdrdao) to the interface. > > I thought they were waiting for CAM support for the ATA > devices. That's how cdrecord & cdrdao work on Linux ATA devices, or > FreeBSD USB devices. As I understand what Linux has done, they put a translation layer between their SCSI system and the ATAPI. Much like FreeBSD does Linux "emulation", Linux translates the SCSI command into an appropriate ATAPI command. This works because ATAPI is very similar to SCSI. Also doesn't hurt that the driver in cdrecord knows what is going on and restricts itself accordingly. Linux's SCSI emulation is a hack and is not worthy of being compared to CAM. -- David Kelly N4HHE, dkelly@hiwaay.net ===================================================================== The human mind ordinarily operates at only ten percent of its capacity -- the rest is overhead for the operating system. To Unsubscribe: send mail to majordomo@FreeBSD.org with "unsubscribe freebsd-questions" in the body of the message
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