MCSE R2 storage Space Storage Spaces

Storage space (Storage Spaces)

First, storage space Overview

You can use storage space technology to virtualize storage by grouping them into storage pools using SATA, USB, and SAS drives, and then create virtual disks called storage spaces from available capacity in the storage pool, providing cost-effective, highly available, scalable, and flexible storage solutions.

With storage space, the Windows storage stack has been fundamentally enhanced and now incorporates two new abstractions:

Storage pool. a collection of physical disks that allow you to aggregate disks, scale capacity in a flexible manner, and delegate administration.

storage space. a virtual disk that is created based on the free space in the storage pool. Storage spaces have properties such as resiliency levels, storage tiers, fixed settings, and granular management controls.

Storage spaces include the following features:

Storage pool. storage pools are the basic building blocks of storage space. You can flexibly create storage pools based on the requirements of your deployment. For example, given a set of physical disks, an administrator can create a pool (using all available physical disks) or multiple pools (dividing the physical disks as needed). In addition, in order to derive maximum value from storage hardware, administrators can combine hard drives and solid state drives (SSDs) in the same pool, use storage tiers to move frequently accessed portions of files to SSD storage, and use write-back caching to buffer small-scale random writes to SSD storage. Simply add additional hard disks to expand the pool dynamically, so you can scale seamlessly to cope with increasing data.

resilient storage. storage space provides three storage layouts (also known as resiliency types):

mirroring. data is replicated on two or three physical disks, which improves reliability but reduces capacity. This storage layout requires a minimum of two disks to protect against a single disk failure, or at least five disks to protect against the two disk failures that occur simultaneously.

Parity check. data and parity information are striped across physical disks, which improves reliability but reduces capacity to some extent. This storage layout requires a minimum of three disks to protect against a single disk failure, and at least seven disks are required to protect against two disk failures.

Simple (non-resilient). data is striped across physical disks, which maximizes capacity and improves throughput, but reduces reliability. This storage layout requires at least one disk and cannot provide protection against disk failures.

continuous availability. The storage space is fully integrated with the failover cluster, allowing for a continuously available service deployment. You can cluster one or more pools across multiple nodes of a cluster. Storage space will be accessed by one node, if necessary (in response to a failure condition or due to load balancing) the storage will fail over seamlessly to another node. Integration with CSV allows extended access to data.

Storage Tiers .

Through the storage tier, you can create virtual disks that include the following two storage tiers:

solid-State drive layer for storing frequently accessed data

hard drive layer for storing infrequently accessed data

The storage space will transparently move sub-file-level data between two tiers based on how often the data is accessed. As a result, storage tiers can dramatically improve the performance of these data by moving the most commonly used ("hot") data to SSD storage without compromising the ability to store large amounts of data on an economy-type HDD.

write-back cache. storage space in Windows Server R2 supports the creation of a write-back cache that uses a small amount of space on an existing SSD in the pool to buffer small-scale random write operations. Random writes that occupy a common enterprise workload are directed to the SSD, which is later written to the HDD.

simple to operate. with Windows Storage Management APIs, WMI, and Windows PowerShell, you can fully script and manage remotely. You can also easily manage storage space through the file and storage services roles in Server Manager. Storage spaces also provide notifications when the amount of capacity available in the storage pool reaches a configurable threshold.

Multi-organization. you can control the management of the storage pool through access control lists (ACLs) and delegate on a per-pool basis to support managed scenarios that require tenant isolation. Storage spaces Follow the familiar Windows security model, so it can be fully integrated with Active Directory Domain Services.

second, other new features of storage space in Windows Server R2

Parity-parity space support for failover clusters

With storage space, you can create parity spaces in a failover cluster.

What value does this change add?

Workloads that exceed the mirrored space now can use parity spaces with one or two copies of parity information (single parity or double parity) to maximize capacity and resiliency while still providing the ability to fail over to other cluster nodes.

Double parity check

Double parity stores two copies of the parity information in the parity space, avoiding two disk failures at the same time.

Automatically rebuilds storage space from storage pool free space

Storage space now includes the ability to automatically rebuild storage space from the storage pool's free space, rather than using a hot spare.

What value does this change add?

Because multiple disks in a pool can accept data stored in a failed disk, you can shorten the rebuild time by not having to wait for a single hot spare to write all the data. In addition, hot spare drives are no longer required, and storage pool free space can provide higher capacity and performance for the pool.

Iii. Deploying storage space on a standalone server

To create storage spaces, you must first create one or more storage pools. A storage pool is a collection of physical disks. From the storage pool, you can create one or more virtual disks. These virtual disks are also known as storage spaces. Storage space is displayed as a regular disk in the Windows operating system, from which you can create formatted volumes.

Step 1: Create a storage pool

You must first group the available physical disks into one or more storage pools

1. In the Server Manager navigation pane, click File and storage services.

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2. In the Navigation Pane, click the Storage Pools page.

4. Under Storage pools, click the Tasks list, and then click New Storage Pool.

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   4. On the Before you begin page, click Next.

   5. On the Specify storage pool name and Subsystem page, enter a name and an optional description for the storage pool, select a group of available physical disks that you want to use, and then click Next.

    

   a. Select the check box next to each physical disk that you want to include in the storage pool.

   b. If you want to designate one or more disks as hot spares, under Assign, click the drop-down arrow, and then click Hot Spare.

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5. On the Confirm Selection page, verify that the settings are correct, and then click Create.

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   8. On the View results page, verify that all tasks are complete, and then click Close.

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   Step 2: Create a Virtual disk

   Next, you must create one or more virtual disks from the storage pool. When you create a virtual disk, you can choose how the data is laid out on different physical disks. This can affect reliability and performance. You can also choose whether to create a thin or fixed setup disk.

   1. If the new Virtual Disk Wizard is not already open, in Server Manager, on the storage pool page, under storage pools, make sure that the storage pool you want is selected.

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   2. Under virtual disks, click the Tasks list, and then click New Virtual Disk.

   The New Virtual Disk Wizard opens.

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   On the Before you begin page, click Next.

   3. On the Select Storage Pool page, click the storage pool that you want, and then click Next.

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   4. On the Specify Virtual disk Name page, enter a name and an optional description, and then click Next.

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   5. On the Select Storage Layout page, click the layout you want, and then click Next.

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   6. On the Specify Settings Type page, click one of the following options, and then click Next.

   Streamline

   If you use thin settings, space will be allocated as needed. This optimizes the usage of available storage space. However, because this allows you to overallocated storage, you must carefully monitor how much free disk space is available.

   Fixed

   With a fixed setting, the storage capacity is allocated immediately when the virtual disk is created. Therefore, the fixed setting uses a space equal to the virtual disk size from the storage pool.

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   7. On the Specify the size of the Virtual Disk page, do the following:

   If you selected the refinement setting in the previous step, in the Virtual Disk size box, enter the virtual disk size, select the units (MB, GB, or TB), and then click Next.

   If you selected a fixed setting in the previous step, click one of the following options:

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MCSE R2 storage Space Storage Spaces