make sure you have disk perfomance counters turned on.  diskperf -y

There's a small  performance hit having them turned on (I heard <2% cpu)

Dan

P:\>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.

-----Original Message-----
From: Jon Hill [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, September 25, 2001 7:16 PM
To: NT System Admin Issues
Subject: RE: perfmon to log


I should mention that this is a short-term project so I have a mandate to
spend as little money as possible.  OpenView, PerfMan and other enterprise
monitoring utilities are therefore out.

-----Original Message-----
From: Jon Hill [mailto:[EMAIL PROTECTED]]
Sent: Tuesday, September 25, 2001 7:05 PM
To: NT System Admin Issues
Subject: perfmon to log


Is there a way to write the perfmon data to a text file periodically (every
fifteen minutes for two weeks, ideally), specifically the Logical Disk
data--Disk writes/sec, disk write bytes/sec?

I've tried using perfmon's native log format but when I choose Data From
that log file, I see the Logical Disk group category but the subcategory box
is empty.  One possible reason is that *some* but not all of the servers I'm
trying to collect data from do not have diskperf turned on.  Obviously that
needs to be addressed, but does one bad apple in a perfmon session spoil the
whole session?  I can't get data on any of the servers, not even the ones
with diskperf set correctly.

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