linux-kernel - Re: Enable CONFIG_USB_SUSPEND by default or some mobile HD can't be unplugged safely

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Message-ID: <20090102142828.GD4833@thyme.bj.intel.com>
Date:	Fri, 2 Jan 2009 22:28:28 +0800
From:	Yan Li <elliot.li.tech@...il.com>
To:	Alan Stern <stern@...land.harvard.edu>
Cc:	gregkh@...e.de, linux-usb@...r.kernel.org,
	linux-kernel@...r.kernel.org
Subject: Re: Enable CONFIG_USB_SUSPEND by default or some mobile HD can't
	be unplugged safely

On Fri, Jan 02, 2009 at 10:00:23PM +0800, Yan Li wrote:
> 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.

Sorry, Alan have not said `cut the power'. He said `disable the port'.

-- 
Li, Yan
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