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Considering checksum type when planning array LUN size and number

When planning the number and size of array LUNs that you need for Data ONTAP, you must consider the impact of the checksum type on the amount of usable space in the array LUN. A checksum type must be specified for each array LUN assigned to a Data ONTAP system.

When an array LUN on the storage array is mapped to be used by a Data ONTAP system, Data ONTAP treats the array LUN as a raw, unformatted disk. When you assign an array LUN to a Data ONTAP system you specify the checksum type, which tells Data ONTAP how to format the raw array LUN. The impact of the checksum type on usable space depends on the checksum type you specify for the LUN.