I use it on my lab VM host which mostly does compiling of OS images and shuttling files back and forth to work. My existing setup was a mirrored 1TB SSD cache tier with 6 x 3TB HDD tier. I wanted to try keeping the SSD tier mirrored, but move the HDD tier to RAID5.
Long story short, the performance is pretty terrible for what I do, but I wanted to write a blog post for anyone looking to do this for their own purposes. I suspect a larger SSD cache might make a difference, but I'm also certain the performance characteristics are good enough for a fancy Plex server or other less write intensive application.
Here's the PowerShell to set it up (change the size values for your array. You might have to guess a bit):
Get-StorageTier | Remove-StorageTier #Delete existing tiers if you have tried this 23939 times.New-StorageTier -StoragePoolFriendlyName StoragePool -FriendlyName SSD_Tier -MediaType SSD -ResiliencySettingName MirrorNew-StorageTier -StoragePoolFriendlyName StoragePool -FriendlyName HDD_Tier -MediaType HDD -ResiliencySettingName Parity$ssd_tier = Get-StorageTier -FriendlyName SSD_Tier$hdd_tier = Get-StorageTier -FriendlyName HDD_TierNew-VirtualDisk -StoragePoolFriendlyName StoragePool -FriendlyName "VirtualDisk" -StorageTiers @($ssd_tier,$hdd_tier) -StorageTierSizes 400GB, 13000GB -WriteCacheSize 50GB