* [PATCH 00/42] v7: separate operations from flags in the bio/request structs @ 2016-04-15 19:15 ` mchristi 0 siblings, 0 replies; 158+ messages in thread From: mchristi @ 2016-04 Average Disk Sec/Read 2. % Free Space Available … After rebooting Windows 2000, disk monitoring for physical drives and logical drives will be available. Jerry Coffin 2003-08-06 16:13:53 UTC. Select these counters for the disk on which you installed Tableau Server (referred to as the instance in PerfMon). Performance Monitor: Missing Logical & Physical Disk Counters 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. Add the different performance counters that you might want to collect. Thanks very much. Logical disk performance counters are running fine. In Reliability and Performance Monitor, I can see that the disk activity is most of the time between 200-360 MB/s, with some drops from time to time. performance counter To enable the logical entities, at the command prompt, type: diskperf -y. Disk sec/Transfer The average number of seconds it takes to get a response from the disk. This is read latency. Simply disable the key with a value of '0' and the counters will appear. 1. Disk