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Buffalo Terastation - Drive and Raid configuration

We had a drive go down in our Buffalo Terastation the other day and ordered the "same" drive from amazon. When we installed the drive it's appearing a bit too small to allow us to do a raid recovery.

Can someone suggest what we should do to ensure we get the exact same drive as the ones we have? Even though we ordered a drive that was ST4000DM000 we couldn't specify the 1F21 portion of it...and the new drive is a little too small.

Here's a screen shot of the other drives plus the new drive.
Raid config
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Andrew Derse
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Andrew Derse
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1 Solution
 
Handy HolderSaggar makers bottom knockerCommented:
Short of sending it back and buying a 6TB one instead I don't think there's much you can do unless you want to delete the data and array and create a new one with the slightly smaller drive as part pf it to start with.
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Andrew DerseIT ManagerAuthor Commented:
Adding a drive that is larger will not affect the array negatively? Don't they all need to be the same size?
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Andrew DerseIT ManagerAuthor Commented:
If I added a larger drive this time, would I also need to match that size in the future?
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Handy HolderSaggar makers bottom knockerCommented:
http://en.faq.buffalo-global.com/app/answers/detail/a_id/14105/p/0,31,32,7000,7002 says it will use the larger disk but ignore the extra space, that's pretty standard with any RAID system. If that disk fails then one of the original size should work as a replacement since it's only used 4GB of the 6GB disk.

Buffalo seem to use "higher capacity" as the key phrase in their documentation so search on you specific model plus "higher capacity" should give confirmation from their FAQs.
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Andrew DerseIT ManagerAuthor Commented:
Thanks for your assistance with this.
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