New-virtualdisk does not create tired storage, but gui does.

Hi

I'm trying to create a Storage Pool with a virtual disk with tierd storage.

Got 2 SSD and 2 HDD.

Created my pool and then I'm trying to create a disk using my ssd and hdd.

$ssd_tier = New-StorageTier -StoragePoolFriendlyName "SnabbPool" -FriendlyName SSD_Tier -MediaType SSD
 $hdd_tier = New-StorageTier -StoragePoolFriendlyName "SnabbPool" -FriendlyName HDD_Tier -MediaType HDD


New-VirtualDisk -StoragePoolFriendlyName "SnabbPool" -FriendlyName TierdDisk1 –StorageTiers @($ssd_tier, $hdd_tier) -StorageTierSizes @(110GB,2700GB) -ResiliencySettingName Mirror -WriteCacheSize 5GB -NumberOfColumns 1

The Disk gets created, but it's not tierd.

If a use the GUI i can create a tierd disk but then i only get 1GB of cache...and i want to do it with powershell.

Anyone seeing an error in mylines ?

One thing i think is wierd is that if i run a get-storagaTier after new-storagetier i get nothing returned.