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27.09.2015
Storage spaces come with features that provide resiliency, scalability, high availability and ease of administrative operations.
Storage Spaces gives administrators the option to deploy a resilient and highly available storage system utilizing cost-efficient hardware – commodity SAS JBOD (Just a Bunch Of Disks) enclosures, and commodity SAS adapters. Storage pool: Provides a means to administer, aggregate, and isolate a set of physical disks. Storage space: Provides an abstraction for resiliency, provisioned capacity, and performance level. Storage Spaces provide resilient storage in the form of mirror spaces with dirty region tracking, and parity spaces with integrated journaling.
Windows’ Failover Clustering is a feature that enables multiple servers (known as cluster nodes) to be formed into a cluster which provides high availability for the underlying storage and supported workloads, such as File Server and Hyper-V. Thin provision allows administrators to have straight-forward storage planning, focusing on the minimum number of physical drives to deploy and the near-term size of their datasets. Mirror Spaces: Stripes and mirrors data across a set of pool disks, supporting a two-way or three-way mirror, which are respectively resilient to single disk, or double disk failures.
Parity Spaces: Stripes data across a set of pool disks, with a single disk write block used to store parity information, and is resilient to a single disk failure. Suitable for large block append-style workloads, such as archiving, in non-clustered deployments.
The mirror and parity resiliency delivered by Storage Spaces allows administrators to still have access to their data even after a drive failure has occurred. This allows enterprises to deploy industry-standard storage hardware and save costs, without any degradation in tolerance to drive failures and power loss events. Simple Spaces: Stripes data across a set of pool disks, and is not resilient to any disk failures.
Suitable for high performance workloads where resiliency is either not necessary, or is provided by the application. To ease the creation of pools and spaces, storage spaces allows the administrator to set default resiliency values, such as number of columns and stripe interleave, for individual storage pools. Journal: In the event of power loss and similar server fault events, the integrity of parity spaces is protected through journaling. Storage Spaces in conjunction with Failover Clustering can deliver a resilient, highly available, and cost-efficient solution which can be scaled from simple deployments to the needs of a large datacenter.
Storage spaces with clustering and CSV while using commodity storage can allow admins to have a cost-effective, scalable, and manageable solution.


Storage Spaces and Failover Clustering can scale along with business needs through the addition of multiple deployment elements of homogeneous or heterogeneous configurations, up to a total of 64 nodes, or 16 4-node deployment elements. Consolidation of multiple workloads into a single server often results in multiple datasets sharing the same storage hardware. Thin provisioning affords administrators the opportunity to provision more capacity than initially available physical storage.
Storage Spaces allows administrators to create spaces which use fixed and thin provisioning in the same pool.
In order to provide easy sharing of storage capacity, each thinly provisioned space only consumes the capacity it actually requires to host data. Storage Spaces provides on-demand provisioning with automated capacity reclamation, using the trim and unmap commands. The pooling model used in Storage Spaces enables flexible and granular administrative control. Storage spaces significantly reduce the cost of available, reliable, and scalable storage because it does not require a storage network and external storage subsystem. It is easily scalable, highly resilient, highly available and easy for administrators to manage.
Microsoft announced the next version of the Windows Server platform called Windows Server 2012 R2 at TechEd North America. Pooling of disks – You can pool physical disks together and create multiple virtual disks on the storage pool even with different resiliency options.
Continuous availability – Storage Pools and Disks can be clustered with the Microsoft Failover Cluster so if one server goes down the virtual disks and file shares are still available. Flexible resiliency options – In Windows Server 2012 you could create a Mirror Spaces with a two-way or three-way mirror, a Parity Space with a single parity and a Simple Space with no data resiliency. Data Deduplication – Data Deduplication was already included in Windows Server 2012 but it is enhanced in Windows Server 2012 R2, and allows you to use it together with Cluster Shared Volumes (CSV) and supports VDI virtual machines. ReFS – The filesystem Microsoft first released with Windows Server 2012 is now also supported for clustering, which means it can be used as a CSV (Clustered Shared Volume). It was just yesterday that Microsoft's Steven Sinofsky detailed the new "Refresh" and "Reset" option found in Windows 8 on the company's Building Windows 8 blog, but he's now already back with an exhaustive overview of yet another new feature. Click Sign In to add the tip, solution, correction or comment that will help other users.Report inappropriate content using these instructions. With ReFS, scrubber goes further by ensuring that if a corruption occurs to a subset of copies, it corrects the corruption from a good copy.


Hence, parity spaces quickly recover from a power loss or similar server fault event by replaying the journal. The JBOD enclosures are connected to all of the servers in the deployment element with data access resiliency as noted in a prior section such that each server has redundant paths to all of the disks in each JBOD enclosure.
In either case, running workloads that support high availability can quickly failover to another server in the event of a server failure or maintenance need. This allows administrators to add drives in advance of the pool’s capacity becoming fully consumed.
Storage Spaces fully integrates with Active Directory and the Windows security model, providing a familiar model and tools for administration. Storage Spaces supports mixed deployments, so it is possible to utilize both SSD and HDD media types and control placement at storage space granularity. Microsoft first released there Software Defined Storage solution called Storage Spaces in Windows Server 2012 and this allows you basically to build your own storage solution based on a simple JBOD hardware solution. Now you can setup new Storage Servers, Storage Pools, Storage Spaces and File Shares directly from Virtual Machine Manager. This time it's "Storage Spaces," which will let you pool both virtual and physical drives (regardless of how they're connected) in a variety of ways to keep your data as safe as possible.
These features help ensure that space is not wasted and data is stored in an optimized and effective method.
Storage spaces is a really cost-effective storage solution which allows companies to save up to 75% of storage costs in compare to traditional SAN storage.
Work as a Cloud Architect for itnetX, a consulting and engineering company located in Switzerland. That includes the ability to expand individual storage pools on an as-needed basis, and various ways to mirror your data for some added redundancy -- as you'd expect, the "spaces" themselves simply behave as a regular disk.
I am focused on Microsoft Technologies, especially Microsoft Cloud Solutions based Microsoft System Center, Microsoft Virtualization and Microsoft Azure.



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