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Expand Up @@ -63,8 +63,8 @@ Value Type: **REG_DWORD**

ReFS has a lazy MM unmap logic. So when ReFS cycles the entire namespace to complete an MM unmap, it unmaps at a certain granularity. The amount of virtual address space that is unmapped is determined by the following formula:

RefsNumberOfChunksToTrim *128 MB (for volume of size > 10 TB)
RefsNumberOfChunksToTrim* 64 MB (for volume of size < 10 TB)
* `RefsNumberOfChunksToTrim * 128 MB` (for volume of size > 10 TB)
* `RefsNumberOfChunksToTrim * 64 MB` (for volume of size < 10 TB)

This option works if the VA range that's being unmapped doesn't have any active references (that is, mapped metadata pages).

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