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HOW TO - Troubleshoot and Repair Disk I/O Errors
Posted by Dustin Hoeppner, Last modified by Julius Leachman III on 06 November 2018 10:26 AM

This KB is relevant to users on versions 9.0 and above.

When you sign into a Cipafilter, you may see the Trouble Notice below. The purpose of this article is to identify the drive displaying the I/O errors.

Issue

WARNING
Disk I/O errors detected in dmesg
 



SOLUTION

Step 1.  To start, we will look in dmesg for any I/O errors. To do this, run the command dmesg | grep I/O making sure to capitalize the I and O.


You will see in the example below that the problem disk is sdc, which is referenced on the last line of the dmesg output.


Step 2.  Next, run the command sudo fdisk -l to see what device sdc is.


In this example, we see that sdc is a hard drive.

 

Step 3.  
Follow this KB entry to attempt to repair the I/O errors - HOW TO - Repair hard drive I/O errors



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