Turn off Disk Performance Monitors to optimize Hard Drive performance

In Windows 2000 and XP, Performance Monitor disk counters for physical disks are turned on by default, disk counters for logical disks are turned off by default.

Open Start menu -> Run -> cmd

and then give the following command to disable all disk monitoring:

• DISKPERF -N
  

To turn it on again(not recommended), run this command:

• DISKPERF -YD
  

all DISKPERF switches are as follows...

-Y Sets the system to start all disk performance counters
when you restart the computer.

-YD Enables the disk performance counters for physical drives when you
restart the computer.

-YV Enables the disk performance counters for logical drives

or storage volumes when you restart the computer.

-N Sets the system to disable all disk performance counters when you
restart the computer.

-ND Disables the disk performance counters for physical drives.

-NV Disables the disk performance counters for logical drives.