Perfmon reporting disk utilisation greater than 100%

[SAKET_5]

Hi All,

Perfmon on Windows Server 2003 reports physical disk utilisation greater than 100% (in some cases the number is as high as 1600%). Performance Object selected is "Physical Disk" and counter is "% Disk Time".

It would appear that the maximum value should be 100%. Can anyone explain the cause for such high readings?

p.s. The disk being monitored is a Smart Array single logical disk and to the OS it should appear as a single spindle.

The HP Proliant Server in question runs standard Proliant Support Pack (including the HP Smart Array driver).

Thanks,
Saket.