The IO operation at logical block address retired

Good Day Each day I get the following errors: The IO operation at logical block address 0x40028 for Disk 3 was retried. I get three of the same errors with three different addresses. Listed under event 153 In Disk manager I have Disk 0, Disk 1 and Disk 2 and CD-Rom 0. So what is disk3? Disk 0 is OS etc (2 x SAS - green LED on) Disk 1 is user data ( 4 x SAS - Green LED on) Disk 2 is a USB drive The server is a PowerEdge T320 Server 2012 Standard I tried to install Dell Support Assistant. I keep getting "an unexpected error occurred while running this request. I followed their pointers, updated browsers both firefox and chrome, enabled what they recommended in the browsers, tried disabling Anti-Virus etc but still crashes, tried reinstalling it too. Would it even help me to diagnose my disc issue? Thank for any assistance.