Manages the Ultrabay on ThinkPad T400

ultrabay.sh

#!/bin/bash

set -e

for i in /sys/devices/platform/dock*; do
        if grep ata_bay "$i/type" &> /dev/null; then
                dock="$i"
                break;
        fi
done

if [[ -z $dock ]]; then
        echo "No ultrabay found."
        exit 1
fi


acpi_power_is_on()
{
        echo '\_SB.PCI0.LPC.CSON' > /proc/acpi/call
        if [[ $(< /proc/acpi/call) == "0x0" ]]; then
                return 0
        else
                return 1
        fi
}

acpi_power_enable()
{
        echo '\_SB.PCI0.LPC.EC.BPON' > /proc/acpi/call
}

case $1 in
        dock)
                if mount | grep /media/hdd &> /dev/null; then
                        echo "HDD already mounted!"
                        exit 0
                fi

                modprobe acpi_call
                enabled=0

                if acpi_power_is_on; then
                        echo "ACPI: Power is already on"
                else
                        echo "ACPI: enabling power..."
                        acpi_power_enable
                        enabled=1
                fi

                echo "Waiting for device to appear..."

                i=0
                while [[ ! -e /dev/disk/by-uuid/363f6627-7b3e-4849-b8f5-d04e11912efa ]]; do
                        if [[ $i -gt 6 ]]; then
                                echo "Timeout!"
                                echo "Device failed to appear."

                                if [[ $enabled == 1 ]]; then
                                        echo "Cutting power again..."
                                        echo 1 > "$dock/undock"
                                fi

                                exit 1
                        fi

                        i=$(( i + 1 ))
                        sleep 1
                done

                echo "Mounting..."
                mount /media/hdd
                ;;
        undock)
                if mount | grep /media/hdd &> /dev/null; then
                        if ! sudo umount /media/hdd; then
                                echo "Could not unmount /media/hdd"
                                exit 1
                        fi
                fi

                sync
                sleep 1

                echo 1 > "$dock/undock"
                ;;
        *)
                echo "Usage: $0 [command]"
                echo "Commands:"
                echo "  undock - Undock ultrabay device"
                ;;
esac