The Avg. Disk sec/Transfer (LogicalDisk\Avg. Disk sec/Transfer) for the logical disk has exceeded the threshold. The performance of applications that rely on this logical disk may be negatively impacted as the disk is taking an unusually long time to service read and write requests.
The Avg. Disk sec/Transfer counter indicates how fast data is being read and written on average for a specific logical disk.
The Avg. Disk sec/Transfer counter is made up from both read and write disk Transfer requests. To view recent disk average rate of read and write Transfer requests you can use the following views:
Logical Disk\Avg. Disk Sec/Reads Performance View
Logical Disk\Avg. Disk Sec/Writes Performance View
A high Avg. Disk sec/Transfer performance counter value may occur due to a burst of disk transfer requests by either an operating system or application.
To increase the available storage subsystem throughput for this logical disk, do one or more of the following:
Upgrade the controllers or disk drives.
Switch from RAID-5 to RAID-0+1.
Increase the number of actual spindles.
Be sure to set this threshold value appropriately for your specific storage hardware. The threshold value will vary according to the disk’s underlying storage subsystem. For example, the “disk” might be a single spindle or a large disk array. You can use MOM overrides to define exception thresholds, which can be applied to specific computers or entire computer groups.