Super User is a question and answer site for computer enthusiasts and power users. It's 100% free, no registration required.

Sign up
Here's how it works:
  1. Anybody can ask a question
  2. Anybody can answer
  3. The best answers are voted up and rise to the top

So I open up Computer Management on my file serving computer in what has to be the first time in months or maybe even over a year and see that the mirror I had created of my 1TB HDD has "failed redundancy". I guess the "backup" HDD is missing (at least Windows thinks it is). Here's a screenshot:

enter image description here

This raises a number of questions. How long has my mirror been missing? And why didn't Windows tell me? What I would have preferred is if Windows maybe, idk... refused to work until the problem was fixed instead or something.

Is there any way to set it up so that next time it does this? So that next time when I have a potentially dead hard drive I find out about it that minute instead of finding out months and months after the fact?

share|improve this question
if there is no such a tool you could make your own tool that notifies if one of your drives missing. – Dilshod Apr 5 '13 at 1:06
Have you checked the notification center icon in your task bar? Most events like this can be placed there. I don't have access to the exact name of the notification center but you should be able to find it. – Ramhound Apr 5 '13 at 11:28

To find out when the failure has happened go to the Event Viewer\Windows Logs\System and look for the following event:

Source:     ftdisk
Event Log:  System
Event ID:   6
Event Type: Error

The device filename that is part of a fault tolerance set has failed and will no longer be used.

To receive an e-mail notification about such events in the future - right-click on the event and select Attach Task To This Event... then choose Send an e-mail as the action for the task.

share|improve this answer
I'm not seeing it: Also how would I attach a task to that event if that event wasn't in my logs? ie. if I were to do a fresh reformat at some point and wanted that task attached to that event. How would I do it? – neubert Apr 5 '13 at 2:00
You can create the task with Task Scheduler\Event Viewer Tasks\Create Basic Task – Alex P. Apr 5 '13 at 3:09

Your Answer


By posting your answer, you agree to the privacy policy and terms of service.

Not the answer you're looking for? Browse other questions tagged or ask your own question.