支持固定硬盘插槽脚本实例

背景：当设备支持2个及两个以上硬盘插槽时（这里举例有两个硬盘插槽C0和C1），用户无法判断哪个硬盘插槽是hda，哪个是hdb，因为内核检测机制是哪个硬盘先被扫描到，哪个就认为是hda。通过修改hotplug脚本，可以实现固定硬盘插槽，比如C0对应hda，C1对应hdb。

脚本实例：

#一个是disk，表示设备本身，对应的$DEVPATH $MAJOR $MINOR分别是/block/hda0: 8 0
#一个是partition，表示设备上的分区，对应的$DEVPATH $MAJOR $MINOR分别是 /block/sda/hda0: 8 1

#硬盘插入：
if [ $ACTION == "add" ];then

	if  ( echo $DEVPATH | grep "/block/sd" > /dev/null 2>&1 ) && [ $DEVTYPE == "partition" ];  then
			for i in a b c d e f
			do
				if ( echo $DEVPATH | grep "/block/sd""$i""" > /dev/null 2>&1 ) then
					if ( readlink -f /sys/block/sd"$i"/device/ | grep "host0" > /dev/null 2>&1) then
						DEVPATH="/block/sda/hda0:"
						/sbin/hotplug_inner
						echo "notice!!!! $DEVTYPE $DEVPATH $MAJOR $MINOR not process" >> /var/log/hotplug.log
						break
					elif ( readlink -f /sys/block/sd"$i"/device/ | grep "host1" > /dev/null 2>&1 ) then
					DEVPATH="/block/sda/hdb0:"
						/sbin/hotplug_inner
						echo "notice!!!! action=$ACTION $DEVTYPE $DEVPATH $MAJOR $MINOR not process" >> /var/log/hotplug.log
						break
					fi	
				fi
			done
	elif  ( echo $DEVPATH | grep "/block/hd" > /dev/null 2>&1 ) && [ $DEVTYPE == "disk" ];  then
		for i in a b c d e f
		do
			if ( echo $DEVPATH | grep "/block/hd""$i""" > /dev/null 2>&1 ) then
				if ( readlink -f /sys/block/sd"$i"/device/ | grep "host0" > /dev/null 2>&1) then
					DEVPATH="/block/hda0:"
					/sbin/hotplug_inner
					echo "notice!!!! action=$ACTION $DEVTYPE $DEVPATH $MAJOR $MINOR not process" >> /var/log/hotplug.log
					break
				elif ( readlink -f /sys/block/sd"$i"/device/ | grep "host1" > /dev/null 2>&1) then
					DEVPATH="/block/hdb0:"
					/sbin/hotplug_inner
					echo "notice!!!! action=$ACTION $DEVTYPE $DEVPATH $MAJOR $MINOR not process" >> /var/log/hotplug.log
					break
				fi	
			fi
		done
	fi
fi

#硬盘拔出

if [ $ACTION == "remove" ];then
		if  ( echo $DEVPATH | grep "/block/sd" > /dev/null 2>&1 ) && [ $DEVTYPE == "partition" ];  then
			for i in a b 
			do
				p=$(ls -l /dev/hd"$i"0: | awk '{print $5}' | sed 's/,//g')
				q=$(ls -l /dev/hd"$i"0: | awk '{print $6}')
				if [[ $MAJOR == $p && $MINOR == $q ]]; then

					DEVPATH="/block/sd"$i"/hd"$i"0:"
					#/sbin/hotplug_inner
					echo "notice!!!! p=$p q=$q action=$ACTION $DEVTYPE $DEVPATH $MAJOR $MINOR not process" >> /var/log/hotplug.log
					break
				fi
			done
		elif  ( echo $DEVPATH | grep "/block/hd" > /dev/null 2>&1 ) && [ $DEVTYPE == "disk" ];  then
			for i in a b 
			do
				#输出结果的第5列内容，并将逗号去掉（注意print $x ，x从1开始数）
				p=$(ls -l /dev/hd"$i": | awk '{print $5}' | sed 's/,//g')
				#输出结果的第6列内容
				q=$(ls -l /dev/hd"$i": | awk '{print $6}')
				if [[ $MAJOR == $p && $MINOR == $q ]]; then
					DEVPATH="/block/hd"$i"0:"
					#/sbin/hotplug_inner
					echo "notice!!!! p=$p q=$q action=$ACTION $DEVTYPE $DEVPATH $MAJOR $MINOR not process" >> /var/log/hotplug.log
					break
				fi	

			done
		fi
	
fi