Hello friends, I the write speed has increased to 100+MB/s after running the command mentioned some where in this forum The below command will change the value from 0 to 1 and the write speed is great. sdparm --set=WCE /dev/sdb sdparm --set=WCE /dev/sdc sdparm --set=WCE /dev/sdd sdparm --set=WCE /dev/sde sdparm --set=WCE /dev/sdf sdparm --set=WCE /dev/sdg   but after reboot the write speed is back to slow i type the below command to check the status sdparm -g WCE /de