Hello, On Wed, Nov 2, 2011 at 11:38 PM, JiSheng Zhang <jszhang3@xxxxxxxxx> wrote: > I have talked with one cdrom firmware engineer, cdrom also need to put > the head at > "park" position. So we also need to let cdrom spin down when poweroff, > suspend etc for lifespan? I'm pretty skeptical that's necessary, and here's what we should do regarding ATAPI devices. Do what Windows does. In many cases, manufacturers are verifying only against windows and deviation from windows behavior usually means trouble regardless of the standard. Even sending TURs repeatedly can send devices into complete lockup. So, I don't really care what the standard says. If windows isn't issuing spindown on shutdown, we shouldn't either. The only thing we would be achieving is to cause timeouts, retrials and device detach before the system eventually can turn itself off. Thanks. -- tejun -- To unsubscribe from this list: send the line "unsubscribe linux-scsi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
