Storage Spaces introduces RAID-like disk pooling to Windows 8

Windows 8 will include a new Storage Spaces feature that allows users to add physical disks into a virtual pool.

by Tom Warren

Jan 6, 2012, 3:39 PM UTC

Windows 8 Storage Spaces

Tom Warren is a senior correspondent and author of Notepad, who has been covering all things Microsoft, PC, and tech for over 20 years.

Microsoft's upcoming Windows 8 operating system, set to enter beta in late February, will include a new virtual disk feature to enable Windows Home Server-like functionality. Storage Spaces lets Windows 8 users group together physical disks into a larger storage pool for increased resiliency in the case of a physical failure — in other words, USB, SATA, and SAS disks are all collated into one virtual disk. Storage Spaces appears to build on a similar functionality called Drive Extender, formerly in Windows Home Server.

To Windows 8, virtual disks look like regular physical disks, and users can partition, format, and copy data to the drive much like traditional storage. With thin provisioning, the process behind this magic, users will be able to create a virtual drive of any size. So, for example, you can create a 10TB Storage Space, even though you only have a 500GB and 1TB drive. While you’ll bump up against the 1.5TB limit, Storage Spaces’s built-in resiliency comes from having at least two copies of all data, within the virtual disk, on at least two physical disks.

If a physical disk fails then it can simply be replaced with little effort, like a traditional RAID setup. Designed to be easy-to-use, Storage Spaces should be a useful Windows 8 addition for fans of Windows Home Server who were disappointed to see similar functionality axed from Microsoft’s software.

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