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Command line: diskperf
DISKPERF [-Y[D|V] | -N[D|V]] [\\computername]

-Y Sets the system to start all disk performance counters
when the system is restarted.

-YD Enables the disk performance counters for physical drives.
when the system is restarted.
-YV Enables the disk performance counters for logical drives
or storage volumes when the system is restarted.
-N Sets the system to disable all disk performance counters
when the system is restarted.

-ND Disables the disk performance counters for physical drives.
-NV Disables the disk performance counters for logical drives.
\\computername Is the name of the computer you want to
see or set disk performance counter use.
The computer must be a Windows 2000 system.
NOTE: Disk performance counters are permanently enabled on
systems beyond Windows 2000.