Script Download: CheckIOInformation.zip
http://gallery.technet.microsoft.com/scriptcenter/Check-IO-information-per-41433025

This script will demonstrate how to list I/O information about all the database files. Such as read load, write load or overall I/O usage.

The script will list all the files I/O information about every database which can be stored in UNC paths or local paths. 

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You can find more All-In-One Script Framework script samples at http://aka.ms/onescriptingallery