Adding Parity to existing array


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If that day comes consider getting one of the LSI SAS cards.. where a regular SATA PCI card is limited to the number of ports physically on the card (typically 2-4-5 ports), the LSI SAS card generally allows for 4 SATA drives on each port.. so a card with 2 ports actually lets you use 8 SATA drives. 

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If it is a new drive, I would pre-clear your drive first to make sure the disk is healthy.  Once that is successful, then you can add it to the array.  The Preclear plug in is available from the community applications "Apps" tab at the top.  If you don't see "Apps" then install that plug in first, then install the preclear plug in, then preclear your disk.  I am pretty sure you know this as well but your parity disk must be the largest disk in your array.  If the disk you are installing is smaller than the other two, its not going to work.

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