Correct, that is an assumption. The sources I had read talked about making sure your VMFS block sizes from your source and destination LUNs are the same otherwise they would perform less due to ...
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Correct, that is an assumption. The sources I had read talked about making sure your VMFS block sizes from your source and destination LUNs are the same otherwise they would perform less due to the block size. Usually this was referring to upgrading VMFS3 -> VMFS5, etc, etc: Storage vMotion performance difference? - Yellow Bricks Blocksize impact? - Yellow Bricks My thoughts exactly with the large IO size of 1MB, and how the mirroring and new writes are affected during the storage vmotion. 64KB is a little small for what should be a streaming read/write and would prefer to increase it to 128, maybe even 512KB. Either way, if this is by design, that is fine. I'm just trying to verify something isn't mis-configured in my stack before I adjust our procedures for migrations, and or find a way to work around the 64KB size.