This corresponds in our case to a duration of 15 minutes. Logical Disk Time Performance Failed performance counter After rebooting Windows 2000, disk monitoring for physical drives and logical drives will be available. The number of outstanding write requests and the amount of bytes read and written to the server’s hard disk. Performance Monitor: Missing Logical & Physical Disk Counters A 'Logical Disk Time Performance Failed' alarm signifies that this performance property value has exceeded the critical threshold value and is in this state for atleast a period of 15 data collection intervals. Basically, there is a reg key value in HKLM/System/CurrentControlSet/Services/PerfDisk/Performance called Disable Performance Counters that when enabled will prevent the disk counters from appearing in PerfMon. However, Idle Time actually uses timestamps in its calculations so I'm assuming it may be more accurate in measuring disk utilization. I am suspecting this to be a false alert. Disk sec/Transfer The average number of seconds it takes to get a response from the disk. Disk sec/Write You can either select a counter from the list or type in one of your own. Can you please let us know what is causing this issue and how to resolve this issue. When you start typing, you are presented with a matching list of common counters. Jerry Coffin 2003-08-06 16:13:53 UTC. Logical Disk