Do it systematically. Replace the faulty one first, then rebuild the raid. Once rebuild is complete, replace the other disk thats about to fail and rebuild again. Not all servers support rebuilding on the fly therefore you might be forced to power down the machine and rebuild from the raid utility.  


On Wed, Aug 14, 2013 at 12:28 PM, charles kungu <charles.kungu@gmail.com> wrote:
I have a server that has 3 hard disks that have been set up on raid 5, The problem is that 1 hdd has failed and another is showing signs of failing. I would like to replace the 2 failed disks without a downtime on the server, is that possible?

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Regards,
C . K


 
 
 
 
 

                                                                                                                       


 

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Best Regards
Jimmy Thuo