Messages in this thread | | | Date | Thu, 01 Jan 2009 22:32:40 +0500 | From | "Alexander E. Patrakov" <> | Subject | Re: Enable CONFIG_USB_SUSPEND by default or some mobile HD can't be unplugged safely |
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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
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