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I have a Windows Server 2008 set as RAID 1. Recentely it changed to "Failed Redudancy".

How do I know which disk failed?

Should I try to resync the array before replacing the disk? If so, what is the correct procedure in this case?

Here is an image showing the current status:

Image showing the current status

  • Have you checked the event logs ? They should specify which hard drive had errors. – Lawrence Jul 16 '14 at 2:31
  • Ok, just checked it. I found some events with id 11 and message "The driver detected a controller error on \Device\Ide\IdePort0". – Fernando Jul 16 '14 at 2:42
  • IDE? How old is this hardware? Regardless, you now have your answer as to which drive it is... – EEAA Jul 16 '14 at 2:48
  • Actually, both are SATA disks. I don't know why it's showing as \Device\Ide\IdePort0. – Fernando Jul 16 '14 at 10:46
  • They may be set to ATA compatibility mode in the BIOS, I think that makes them appear to be IDE to the O/S. – ThatGraemeGuy Jul 24 '14 at 9:43
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Check the event logs. The events with ID 11 will specify which port the device that is having issues is on.

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