Limitations

Number of drives and capacity:

  • Up to 240 drives in one pool (in Windows Server 2012 R2, earlier - up to 160) but there can be several pools.
  • Up to 80 drives in a clustered pool (up to 4 pools in cluster).
  • Up to 64 virtual disks in one pool.
  • The total capacity of the pool is up to 480 Tib.

Columns and number of drives in a virtual disk (VD):

VD-type

Minimum number of columns

Column / Drive Ratio

Minimum number of drives

Maximum number of columns

Simple

1

1:1

1

-

2-way mirror

1

1:2

2

-

3-way mirror

1

1:3

5

-

Single parity

3

1:1

3

8

Dual parity

7

1:1

7

17

Also:

  • The Storage Spaces virtual disk cannot be used as a boot disk.
  • Only SAS, SATA and USB drives can be used. RAID controllers' volumes, iSCSI, FC and other volumes are not supported.

Cluster use requirements:

  • "Thin" disks cannot be used. Only fixed provisioning is allowed.
  • The minimum number of disks for a double mirror is 3, for a triple mirror it is 5.
  • In a cluster: you can use VDs with Parity but only starting with Windows Storage Server 2012 R2.
  • Disks used: only SAS with SPC (SCSI persistent reservation) support. Some of the early versions of SAS-drives do not support SPC…

 

< Previous | Content | Next >