We are getting Disk transfer (reads and writes) latency is too high alerts.

The Avg. Disk sec/Transfer (LogicalDisk\Avg. Disk sec/Transfer) for the logical disk has exceeded the threshold. The logical disk and possibly even overall system performance may significantly diminish which will result in poor operating system and application performance.

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.

Apply Hotfix 2495300 on Server 2008 and Apply Hotfix 2470949 on Server 2008 R2.

Invalid "Avg. Disk sec/Transfer" value returned by the RegQueryValueEx function in Windows Server 2008 or in Windows Vista

The RegQueryValueEx function returns a very large incorrect value for the "Avg. Disk sec/Transfer" performance counter in Windows Server 2008 R2 or in Windows 7