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Re: Silent RAID-1 degradation on CentOS 5?



 John Abreau wrote: 

> What could have caused this to silently fail like this, and how 
> can I restore RAID safely? 
> 
> We had a power outage a few weeks ago that lasted longer than 
> the UPS's battery capacity; I suppose that could be the underlying 
> cause of it degrading to non-RAID status. But why would it 
> do that silently? 
> 

I had a similar situation a few weeks back where my power was rudely 
interrupted.  When the machine was brought back up, the second element 
in each RAID1 array was offline.  Adding/resynching was quick, easy, and 
it worked.  I don't know why it dropped, but yours doesn't seem to be an 
isolated incident. 

 -Don 

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