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Event ID: 4 Source: dmio

Source
Level
Description
dmio: write error on Plex Volume1-02 of volume Volume<value> offset <offset> length <value>.
Comments
 
I received this warning 3 times along with Event ID 7, Source Disk. In my case, one of the hard drives in a mirrored pair lost sync and became orphaned. I regenerated the sync using disk management (right click My Computer, select Manage, go to disk management and then right click on the hard drive with a yellow exclamation point and select regenerate). Next, run chkdsk /r via command prompt to check for disk errors.

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