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Hello list, |
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Recently I came into possession of an external USB hard drive. The |
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user's manual (obviously) stated that I should always use "safe removal |
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function" prior to disconnecting the hard drive. I suspect the purpose |
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of this is to tell the device to properly park the heads and power down, |
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but I don't have any idea how to do that on linux. |
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I tried writing '3' to /sys/bus/usb/device/.../power/autosuspend and |
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'auto' to /sys/.../power/control but this doesn't power down the drive. |
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I do hear the indicative "click" after 3 seconds (at least I think I do), |
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but the "PWR" led still stays on, /sys/.../power/runtime_status still |
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says "active" (instead of "suspended") and I can access the data on the |
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block device /dev/sdb, all of which suggests that the drive is still |
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powered on. |
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So, perhaps you could give me a tip on how to properly detach USB |
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drives or link me to an up-to-date information about the kernel's USB |
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subsystem. |
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I should mention that I'm not using any of the over-complicated DEs, |
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just the bare bones X server with awesomewm and a terminal emulator. |
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I'm currently running kernel version 3.12.6-gentoo with udev-208 and |
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udisks-2.1.1 |