On Fri, Jan 02, 2009 at 10:56:43AM +0100, Tino Keitel wrote: > With a WD My Passport drive (2,5"), I need to use sg_start --stop --pc=3 > to stop the disk before unplugging it. Maybe this works with your > drive, too. This is also required by some Firewire hard disks. Maybe > the eject command should be extended to use this method, as it is used > also by HAL to eject hotplug devices. Hum... I grepped my hal and hal-info packages but haven't found any scripts using `sg_*'. I'm using hal package 0.5.11-6 from Debian testing. Now I know 3 methods supposed can be used to shut the device: 1. (Alan Stern said Windows use this) cut the USB port's power 2. send STOP SCSI command to stop it 3. put it into suspend mode For the 1st method I have no much experience with Windows so I can't verify. But now I doubt it. Since there are many early USB devices that still show light on after you "safely remove" it from Windows. I guess the power is still supplied but the device is send a command to be shutdown or suspended. For the 2nd and 3rd methods, I don't know which one is better, hope some experts can give advice. Whatever, I think the suspend mode is a standard USB design and the kernel should support it by default so we should enable CONFIG_USB_SUSPEND. -- Li, Yan -- To unsubscribe from this list: send the line "unsubscribe linux-usb" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
