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USB抜き差しせずコマンドで再認識

USBデバイスが認識おかしくなり抜き差しをやむ得ないことはたまにある。
USBメモリやUSBHDDなどではしょっちゅう。

参考

コマンドでusb再認識

# udevadm info --query=path --name=/dev/video0
/devices/pci0000:00/0000:00:1d.7/usb2/2-1/2-1.2/2-1.2:1.0/video4linux/video0

usb2/2-1

この2-1が該当のパスとなるので以下投入。

# echo -n "2-1" > /sys/bus/usb/drivers/usb/unbind
# echo -n "2-1" > /sys/bus/usb/drivers/usb/bind

usb-hdd

sudo udevadm info --query=path --name=/dev/sdc
/devices/pci0000:00/0000:00:04.1/usb1/1-1/1-1:1.0/host2/target2:0:0/2:0:0:0/block/sdc
echo -n "1-1" > /sys/bus/usb/drivers/usb/unbind
echo -n "1-1" > /sys/bus/usb/drivers/usb/bind
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32
Help us understand the problem. What are the problem?