From: "Alexander E. Patrakov" <patrakov@gmail.com>
To: public-gregkh-l3A5Bk7waGM@hugh.gmane.org,
public-linux-usb-u79uwXL29TY76Z2rM5mHXA@hugh.gmane.org,
public-linux-kernel-u79uwXL29TY76Z2rM5mHXA@hugh.gmane.org,
public-elliot.li.tech-Re5JQEeQqe8AvxtiuMwx3w@hugh.gmane.org
Subject: Re: Enable CONFIG_USB_SUSPEND by default or some mobile HD can't be unplugged safely
Date: Thu, 01 Jan 2009 22:32:40 +0500 [thread overview]
Message-ID: <495CFE38.6070603@gmail.com> (raw)
In-Reply-To: <20090101160343.GA4278@thyme.bj.intel.com>
Yan Li wrote:
> Hello List,
>
> By default CONFIG_USB_SUSPEND is not enabled and today I got bite by
> this when I got a new WDC My Book hard drive. I have no way to unplug
> it safely, according to it's manual, with a kernel that doesn't have
> CONFIG_USB_SUSPEND=y.
>
> On it's manual read "you should unplug and remove the device only when
> the light is off." On Linux unmounting it won't turn it's light off
> and I can feel it's motor is still running. The only way to unplug it
> properly on a Linux system, as to my knowledge, is to echo `suspend'
> to `/sys/bus/usb/devices/$DEV/power/level'. And one has to have
> CONFIG_USB_SUSPEND=y to do this.
>
> On Windows and Mac OS, `safely remove this device' function effectly
> turns it into `suspend' mode, and it's light off.
You have obviously tested only Windows XP, because Vista doesn't cut the
power for at least some USB devices. And congratulations for obtaining a
Vista-incompatible hard drive (of course, joking).
BTW, does the "eject /dev/$DEV" command help?
--
Alexander E. Patrakov
next prev parent reply other threads:[~2009-01-01 17:33 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2009-01-01 16:03 Enable CONFIG_USB_SUSPEND by default or some mobile HD can't be unplugged safely Yan Li
2009-01-01 16:07 ` [PATCH] enable CONFIG_USB_SUSPEND by default Yan Li
2009-01-01 17:29 ` Enable CONFIG_USB_SUSPEND by default or some mobile HD can't be unplugged safely Alan Stern
2009-01-02 13:23 ` Yan Li
2009-01-01 17:32 ` Alexander E. Patrakov [this message]
2009-01-01 17:45 ` Alan Stern
2009-01-02 13:37 ` Yan Li
2009-01-02 13:46 ` Alexander E. Patrakov
2009-01-01 19:09 ` Robert Hancock
2009-01-02 9:56 ` Tino Keitel
2009-01-02 14:00 ` Yan Li
2009-01-02 14:08 ` Tino Keitel
2009-01-02 14:28 ` Yan Li
2009-01-02 16:04 ` Alan Stern
2009-01-03 2:33 ` Yan Li
2009-01-02 15:50 ` Mark Lord
2009-01-02 15:51 ` Mark Lord
2009-01-02 18:15 ` Tino Keitel
2009-01-03 2:24 ` Yan Li
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