KyonLi · April 24, 2023 11:21 · Apr 24, 2023 · Apr 24, 2023 · Apr 24, 2023
diff --git a/README.md b/README.md
@@ -6,7 +6,7 @@
 
 /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](#disk_standby.sh)，添加执行权限`chmod +x disk_standby.sh`
+2. 在共享文件夹`Public`中创建`scripts`目录，向其中放入[disk_standby.sh](#file-disk_standby-sh)，添加执行权限`chmod +x disk_standby.sh`
 3. 添加定时任务
 ```shell
 echo "0 4 * * * /share/Public/scripts/disk_standby.sh readd" >> /etc/config/crontab

diff --git a/README.md b/README.md
@@ -6,7 +6,7 @@
 
 /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](disk_standby.sh)，添加执行权限`chmod +x disk_standby.sh`
+2. 在共享文件夹`Public`中创建`scripts`目录，向其中放入[disk_standby.sh](#disk_standby.sh)，添加执行权限`chmod +x disk_standby.sh`
 3. 添加定时任务
 ```shell
 echo "0 4 * * * /share/Public/scripts/disk_standby.sh readd" >> /etc/config/crontab

diff --git a/README.md b/README.md
@@ -0,0 +1,15 @@
+# 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](https://wiki.qnap.com/wiki/Running_Your_Own_Application_at_Startup)，编辑autorun.sh加入以下内容
+```shell
+#!/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](disk_standby.sh)，添加执行权限`chmod +x disk_standby.sh`
+3. 添加定时任务
+```shell
+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
+```
diff --git a/disk_standby.sh b/disk_standby.sh
@@ -0,0 +1,60 @@
+#!/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
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