Data access failures If you have redundancy at all levels, you can protect against failed components, such as a failed cable from the enclosure to the server, a failed SAS adapter, power faults or failure of a JBOD backplane. To protect against complete disk enclosure failure, you can use redundant JBOD enclosures. Server node failures Through the Failover Clustering feature, you can provide high availability for the underlying storage and workloads.
This helps protect against server failure and enables you to take a server offline for maintenance without service interruption. This topic includes two methods that you can use to create a clustered storage space. You can do either of the following:. Configure storage spaces in File and Storage Services before you create the failover cluster, and then add the storage spaces as eligible storage during failover cluster creation.
If you want to use this method, follow steps 1 through 4 in this topic. Optionally, you can complete step 6 to add the volume to a CSV. Create a clustered storage space by using Failover Cluster Manager after you create a failover cluster. If you want to use this method, skip step 3 in this topic. This topic includes sample Windows PowerShell cmdlets that you can use to automate some of the procedures described.
For more information, see Using Cmdlets. To support clustered storage spaces, your configuration must meet the prerequisites that are outlined in the following table. Also, it provides resiliency to a failure of a physical path and load balancing across physical paths. Windows PowerShell equivalent commands. The following Windows PowerShell cmdlet or cmdlets perform the same function as the preceding procedure.
Enter each cmdlet on a single line, even though they may appear word-wrapped across several lines here because of formatting constraints. Before you create the failover cluster, verify that all servers that you want to add as cluster nodes can see the shared disks.
To verify from one console that all servers can see the shared disks, make sure that you add all computers that you want to add as cluster nodes to Server Manager. If you want to create storage spaces before you create the failover cluster, the disks do not have to be online or initialized. The disks must not be partitioned.
If you want to create a clustered storage space by using Failover Cluster Manager after you create a failover cluster, the disks must be online and initialized without partitions. The following example lists the disks that are visible to the server. This includes their online or offline status and excludes the system disks.
The following example lists the disks that are available for the storage pool, where the bus type is SAS. The following example initializes the disks that you specify. You can obtain the disk numbers from the output of the Get-Disk cmdlet. This step shows how to create storage spaces before you create the failover cluster by using the shared physical disks. When you create the failover cluster, if you designate that you want to add all eligible storage, the storage pools are automatically added as clustered storage pools with the associated virtual disks and volumes.
Skip this step if you want to create a clustered storage space by using Failover Cluster Manager after you create a failover cluster. On one of the servers that you want to add as a cluster node, configure storage spaces as described in Deploy Storage Spaces on a Stand-Alone Server.
However, to use with failover clustering, make sure that you do the following:. Verify that the disks meet the requirements that are outlined in the Prerequisites section of this topic.
Only SAS disks are supported in a clustered storage space. When you create a storage pool, you must select at least three physical disks. If you want to use the mirror resiliency type to protect against disk failure, make sure that you select at least three physical disks for a two-way mirror or at least five physical disks for a three-way mirror.
This step shows how to install a failover cluster that you can use to host clustered storage spaces. For more information about failover clustering, see Failover Clustering Overview.
Install the Failover Clustering feature on each node. On one of the nodes, open Failover Cluster Manager, and then under Management , click Validate Configuration to validate the cluster. When you run the validation tests, make sure that you include the storage tests.
If you have already created storage spaces in File and Storage Services, on the Confirmation page of the Create Cluster Wizard, verify that the Add all eligible storage to the cluster check box is selected. If you have not yet created any storage spaces, make sure that you do not add the physical disks as cluster disks. Therefore, on the Confirmation page of the Create Cluster Wizard, clear the Add all eligible storage to the cluster check box. If you had existing storage pools that you added to the failover cluster as eligible storage, after you create the failover cluster, verify that the storage appears in Failover Cluster Manager.
To do this, follow these steps:. Video Hub Azure. Microsoft Business. Microsoft Enterprise. Browse All Community Hubs. Turn on suggestions. Auto-suggest helps you quickly narrow down your search results by suggesting possible matches as you type.
Showing results for. Show only Search instead for. Did you mean:. Sign In. Published Sep 20 AM Creating Tiered Storage 1. Figure1: Server Manager view of attached disks 2. Figure 2: The Primordial Pool 3.
Right-click the Primordial pool, and create a new pool. Figure 3: Create a new pool 4. Give the new pool a name. Figure 4: Naming the pool 5. Figure Changing resiliency defaults for a storage pool 9. Figure Refresh Server Manager Select the layout for the storage. In my example, I want to use mirroring. Figure Choose resiliency level Select two-way mirror.
Figure Two-way mirror When using tiers, you must use fixed provisioning. Figure Fixed Provisioning Figure Confirm selections Figure Completion of virtual disk creation Assign a drive letter for the volume. Figure Assign drive letter. Specify a volume label if you choose. Figure Volume Label Confirm choices. Figure Final Confirmation Figure Last step may take a while to complete Virtual disks created from free space in a storage pool.
Storage spaces have such attributes as resiliency level, storage tiers, fixed provisioning, and precise administrative control. You can manage Storage Spaces through:. Storage pools are the fundamental building blocks for Storage Spaces.
Storage administrators are already familiar with this concept, obviating the need to learn a new model. They can flexibly create storage pools based on the needs of the deployment.
For example, given a set of physical disks, an administrator can create one pool by using all the available physical disks or multiple pools by dividing the physical disks as required. Furthermore, to maximize the value from storage hardware, the administrator can combine hard disks and solid-state drives SSDs in the same pool, using storage tiers to move frequently accessed portions of files to SSD storage, and using write-back caches to buffer small random writes to SSD storage.
Pools can be expanded dynamically by simply adding additional disks, thereby seamlessly scaling to cope with data growth. Resilient storage. Storage Spaces provides three storage layouts also known as resiliency types :. Writes data in a stripe across multiple disks while also writing one or two extra copies of the data. Use the mirror layout for most workloads — it helps protect your data from disk failures and provides great performance, especially when you add some SSDs to your storage pool and use storage tiers.
Writes data in a stripe across physical disks while also writing one or two copies of parity information. Simple no resiliency. Writes data in a stripe across physical disks without any extra copies or parity information. You can also use the simple layout when your application provides its own data protection.
Additionally, Storage Spaces can automatically repair mirror and parity spaces in which a disk fails by using dedicated disks that are reserved for replacing failed disks hot spares , or more rapidly by using spare capacity on other disks in the pool. Storage Spaces also includes background scrubbing and intelligent error correction to allow continuous service availability despite storage component failures.
In the event of a power failure or cluster failover, the integrity of data is preserved so that recovery happens quickly without lost data. Continuous availability. Storage Spaces is integrated with failover clustering, which allows it to deliver continuously available service deployments. One or more pools can be clustered across multiple nodes within a single cluster.
Storage spaces are accessed by one node, and the storage will seamlessly fail over to a different node when necessary in response to failure conditions or due to load balancing.
0コメント