The Disk Time (Percent) metric calculates the percentage of elapsed time during which all the disks were busy servicing read and write requests on the SQL Server computer. This counter is measured by subtracting the Disk Idle Time percent from 100. The WMI object Win32_PerfRawData_PerfDisk_PhysicalDisk
property PercentIdleTime
is measured to get Disk Idle Time percent.
If this metric value regularly exceeds 75%, consider the following solutions:
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