You have selected free tutorial of the Microsoft Corporation for the Microsoft Technology Associate (MTA) :
98-365: MTA: Windows Server Administration Fundamentals :
Module 2: Understanding Server Roles :
Redundant Array of Independent Disks consists of multiple disks grouped together. The
array allows you to build out fault-tolerant disks and scale disks together to get high levels of
performance. Multiple types of RAID exist that offer many different methods of performance
and failover. The RAID technologies are the backbone of the internal workings of iSCSI, SAS,
and Fiber Channel SAN enclosures. The following link provides information evaluating the
types of RAID and when to use them, plus a breakdown of the different types in more detail:
Storage Spaces is considered one of the great new features of Windows Server 2012 and Server
2012 R2. The main advantage is the ability to manage a bunch of disks as a single virtual disk
drive. The virtual disk type dictates how data is written across the physical disks.
Currently there are three choices:
- Simple As the name implies, this is a simple stripe set without parity. Consider this closer
to a RAID 0. A simple layout provides no redundancy, so any disk failure can cause problems
with data access. It is used primarily to increase throughput and maximize capacity.
- Mirror This is a RAID 1 confi guration that increases reliability by using two disks (for
example), which allows one disk to fail without causing interruption. The major drawback is
the loss of disk space because one of the disks is used as a copy (mirror) of the other.
- Parity This is similar to a RAID 5 confi guration; it is a striped set of data across disks with
distributed parity. By striping data and information across multiple disks, it increases the reliability.
As with RAID 5, you need a minimum of three disks.
If you are unfamiliar with disk RAID, I recommend you look at the following site for full
information on the background of RAID and RAID levels: http://en.wikipedia.org/wiki/RAID.
Storage Spaces has three basic components:
- Physical Disks If you are leveraging physical disks for your storage pools, here are the
- Minimum of one physical disk.
- Two physical disks to create a resilient mirror virtual disk.
- Three physical disks for resilient mirroring with parity.
- Five physical disks for three-way mirroring.
- All hard disks must be blank (unformatted).
- iSCSI, SATA, SAS, SCSI, and USB are supported disk types.
- Storage Pool A storage pool consists of one or more physical disks that you are using to create
a virtual disk. An unformatted blank disk can be added into a storage pool at any time.
- Virtual Disks These are considered the same as physical disks from an application or user
perspective. The benefi t is that virtual disks are far more fl exible, and they have the resiliency
of physical disks with built-in mirroring.
Your Salary Above $ 66000... Click ...
Ohh! You want More.... be game developer of your choice $ 102000 ....