#Are LUNS the same?

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hearty hamlet
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If I create a lun on a volume in system manager, is it the same as a lun created inside of SnapCenter? If not, what is the difference?
I created several luns, in system manager, for a microsoft failover cluster. I see this in the docs for creating FC connected luns: "The volume should hold LUNs only, and only LUNs created with SnapCenter." So I am wondering why, is there something SC does?
Cant I just create LUNs in system manager, or via powershell or something, and have them work in a failover cluster and back them up/mirror and vault with snapcenter?

dry jay
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this note is just there so that SnapCenter knows about all LUNs in the volume. It doesn't know if you create other LUNs directly.
There was a bug that if SnapCenter deletes the last LUN in a volume, it will also delete the volume. The bug was that it didn't check if there were other (non-SC-created LUNs) in that volume and happily deleted those as well.
This bug has been long fixed, but I guess the suggestion to have only SC-created LUNs in a volume still stands

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also, SnapCenter makes sure that the correct parameters are applied to the LUN (mainly the OS type) which could be wrong if done by hand, decreasing performance