QNAP硬盘休眠

README.md

QNAP硬盘休眠

适用于系统盘为SSD数据盘有HDD的情况，实现开机自动解除HDD系统占用，每天4:00~4:30自动同步数据避免系统出错

1. 启用开机自启，参考wiki，编辑autorun.sh加入以下内容

#!/bin/sh

/share/Public/scripts/disk_standby.sh start

2. 在共享文件夹Public中创建scripts目录，向其中放入disk_standby.sh，添加执行权限chmod +x disk_standby.sh
3. 添加定时任务

echo "0 4 * * * /share/Public/scripts/disk_standby.sh readd" >> /etc/config/crontab
echo "30 4 * * * /share/Public/scripts/disk_standby.sh remove" >> /etc/config/crontab
crontab /etc/config/crontab && /etc/init.d/crond.sh restart

disk_standby.sh

#!/bin/bash

MD_DEVICES="md9 md13"
SYS_DEV=$(df $(getcfg SHARE_DEF defVolMP -f /etc/config/def_share.info) | awk '/^\/dev/ {print $1}')

turn_off_swap(){
    echo "Turning off swap on HDD..."
    for partition in $(cat /proc/swaps | grep partition | awk '{print $1}'); do
        swapoff $partition
    done
}

remove_from_raid(){
    for md in $MD_DEVICES; do
        echo "Disconnecting HDD from /dev/${md}..."
        save=
        for partition in $(mdadm -D /dev/${md} | grep 'active sync' | awk 'NF{ print $NF }'); do
            disk=${partition//[[:digit:]]/}
            disk=${disk#"/dev/"}
            if [ $(cat /sys/block/${disk}/queue/rotational) = 1 ]; then
                mdadm /dev/${md} --fail ${partition}
                save=${save}${partition}$'\n'
            fi
        done
        [ -n "$save" ] && echo -n "$save" > /tmp/disk_standby_${md}
    done
}

readd_to_raid(){
    for md in $MD_DEVICES; do
        [ ! -f "/tmp/disk_standby_${md}" ] && break
        echo "Reconnecting HDD to /dev/${md}..."
        for partition in $(cat /tmp/disk_standby_${md}); do
            mdadm /dev/${md} --re-add ${partition}
        done
        rm "/tmp/disk_standby_${md}"
    done
}

case "$1" in
    start)
        turn_off_swap
        remove_from_raid
        ;;
    remove)
        remove_from_raid
        ;;
    readd)
        readd_to_raid
        ;;
    *)
        echo "Usage:"
        echo "  $0 [command]"
        echo "    command:"
        echo "      start - turn off swap and remove hdd from raid1."
        echo "      remove - remove hdd from raid1."
        echo "      readd - readd hdd to raid1."
        exit 0
        ;;
esac