Exclude notification for the disk /dev

Dear Friends,

I want to exclude the notification for the drive "/dev".Many of the server
have /dev storage.it's almost reaches the disk percentage 95%.We have
received couple of notification for those server.

High threshold exceeded for SNMP datasource hrStorageUsed / hrStorageSize *
100.0 on interface 172.17.250.55, parms: label="/dev" ds="hrStorageUsed /
hrStorageSize * 100.0" description="Trigger an alert when the percentage of
disk space used reaches or goes above 90% for two consecutive measurement
intervals (only for disks of type hrStorageFixedDisk, such as a locally
attached or USB-attached hard disk)" value="100" instance="34"
instanceLabel="dev" resourceId="node[48].hrStorageIndex[dev]"
threshold="95.0" trigger="2" rearm="90.0"

Could you please tell how to exclude/avoid  /dev disks notification/alert.

*Thanks & Regards*
*Yusuf*

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