Mark as flash Disk?

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Hello all, I have a few questions about this feature.

1. What does “Mark as Flash Disk” actually do?

2. Is there an advantage of marking an SSD LUN which is falsely recognized as HDD as Flash Disk, in a non-vSAN cluster. In this case the LUN is presented from a SAN backed by a pool of physical SSD drives.

3. In a scenario where a LUN presented comes from a tiered SAN pool, i.e.: mix of HDD and SSD drives where Software-Defined SAN moves hotcold blocks up and down fromto HDD and SSD, would it not be recommended to mark that LUN as FLash Disk?

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