On Fri, 23 May 2014, Marnitz Gray wrote:
Hello good people of linux-raid.
Your output seems to indicate that you have one drive with an event count that is 6 events off the others. This most likely means it's safe to use --assemble --force in order to make this get accepted.
You didnt' state if you had space for more drives in your system, but you seem to have a recent mdadm and hopefully then a recent kernel, hook up the new drive to the system at the same time as the old one, add it as a spare, and use mdadm --replace. Then it'll online-replace the drive you want to change without degrading the array. This is a lot safer procedure.
Also consider going RAID6 if at all possible, you could do that when you're done replaceing all the drives with 3TB ones.
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