Users Guide

Get-FileStorageTier –VolumePath <csvVolumePath>

Example:

Pinning a VHDX file called myVHDX, which is on exampleShare on a CSV labeled Volume3. The storage

tier is called MyPool1_SSD.

Set-FileStorageTier –FilePath “C:\ClusterStorage\Volume3\Shares\exampleShare

\myVHDX.vhdx” –DesiredStorageTierFriendlyName “MyPool1_SSD”

For a correctly designed storage pool, it is recommended that you evenly spread the SSDs and HDDs

across the pools and enclosures. Storage tiers are configured for each storage pool and it is

recommended to create one SSD tier and one HDD tier for each storage pool.

The following equations are for planning purposes when you start creating VDs in your storage pools.

The values from the equations are used to understand the upper limit for capacity planning so that you

are always leaving 10 percent of HDD raw disk space and 10 percent of SSD raw disk space free across

the pool as you create and size each VD for automatic rebuilds. These are not intended to be equations

to guide you about sizing the tiers of the individual VDs. If you are not using automatic rebuilds,

multiplying by 0.9 is not necessary.

Raw SSD Usable Capacity Per Pool =(Number of SSDs in the pool)* SSD Capacity*(.9 for automatic

rebuild space)

Raw HDD Usable Capacity Per Pool =(Number of HDDs in the pool)*HDD Capacity*(.9 for automatic

rebuild space)

Tier size is the raw value modified by a resiliency factor depending on the type of Storage Space you are

creating. For example, 1 for a Simple Space, 1/2 for a Two-way Mirror, and 1/3 for a Three-way mirror.

SSD Tier Per Pool = (Number of SSDs in the pool)*(SSD capacity)*(.9 for automatic rebuild

space)*(Resiliency Factor)

HDD Tier Per Pool = (Number of HDDs in the pool)*(HDD capacity)*(.9 for automatic rebuild

space)*(Resiliency Factor)

For example,

A pool is created with 48 x 4 TB and 12 x 800 GB disks called tierPool1. Only two VDs exist in this pool,

one with Two-way mirroring called 2wayVD1 and one with Three-way mirroring called 3wayVD1.

2wayVD1 HDD tier was 41 TiB, which uses 82 TiB of the HDD tier because of the 50 percent resiliency

overhead for Two-way mirroring. The SSD tier was 2.4 TiB in size, which uses 4.8 TiB of SSD tier because

of resiliency overhead.