Adding new storage to an EMC VNX 5300

I have an existing EMC VNX 5300 that I have just added two new storage DAE shelves.
DAE 1 has 15 900 GB SAS drives and DAE2 has 15 2TB NL SAS. I want to configure each DAE to be RAID5 with a spare. When creating the pool should I put all 15 drives in the pool to get the configuration I’m looking for to give me the RAID 5 and still give me a spare?

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How big of an allocation LUN do you need/want.  I would recommend against using raid 5 as a disk failure especially with a no 2TB size with 14 drives will take a long time to rebuild and a subsequent failure during that process will crash the volume possibly leading to data loss.
Add the 14 and create the volume/LUN

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