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Now that we've looked at dynamic disks, let's look at the dynamic disk topic in a little bit more detail. The first thing we want to look at is dividing dynamic disks into volumes. Dynamic disk supports five volume types. The first volume type is the simple volume. In a simple volume, you basically take one hard drive, and you create a volume out of that hard drive. A second volume type is a spanned volume. In a spanned volume you can take two or more hard drives, or portions of two or more hard drives and create a single volume spanning all those drives or portions of drives.
The striped volume, which is also known as RAID-0. And is also sometimes called striped volume without parity. Allows you to take two or more hard drives and spread your volume out over those multiple hard drives. However, when it does that it saves a portion of the data to each hard drive. For example, if you had 3 hard drives has a striped volume, one third of your data would be saved to each hard drive. This allows you to write and read from the hard drive much more quickly. However, the downside to this is that, if a single one of a hard drives in a striped volume goes down, you will lose all the data in the volume.
A fourth volume that is supported by Dynamic Disk is the Mirrored volume. This is also called RAID-1. It is the first fault tolerant disk volume type supported by Dynamic Disk. In a Mirrored volume, you take two hard drives that are exactly the same size and you store the data to both hard drives at the same time. Now, this means is, I take the data, store on one hard drive and make a copy to the other hard drive, so that if one hard drive goes down, I will still have my data on the second hard drive for backup and redundancy purposes.
The RAID-5 volume or the striped volume with parity is the fifth type of volume support of bi-dynamic disk. The RAID-5 volume works very similar to the Striped volume in that it takes the data and stores a portion of it on each drive in the volume set. The difference is that along with the data stored in each portion of the volume set. It stores additional information that enables you to recreate the data stored on the volume if one of the hard drives goes down.
If two or more of the hard drives go down the data is completely lost. Another thing to keep in mind about RAID-5 volumes is that you must use at least three hard drives to create this volume. Beyond volume types, there are also multiple file systems that are supported by server 2012. The file system is the underlying structure that allows a disk to store data. Data is stored on a file system by formatting a partition or volume based on the file system at that time.
Windows Server 2012 supports 5 different file systems. The file systems supported by Server 2012 are FAT 16, FAT 32, exFAT, NTFS,. And, ReFS, or resilient file system. The FAT 16 and FAT 32 file systems are very old file systems that are generally not used anymore. The extended FAT the file system used for storing data on removable media such as.
USB sticks. I want to take a little bit closer look at the NTFS and resilient file systems. The NTFS file system is the preferred file system to use in Windows Server. The current version of NTFS, which is part of the Windows Server 2012. Has been improved to support larger disk because the requirements have increased for Server 2012. NTFS can also secure your file system all the way down to the file level. That means you can even control who has access of the very files of the file system.
NTFS also allows you to encrypt folders on the hard drive. NTFS encrypts the folder on the hard drive by using EFS or encrypted file system service. This will allow you to encrypt all the data in a given folder on your NTFS system. Finally, not only can NTFS restrict users based on files it also has the ability to restrict access to users based on computers, folders or other resources on the network.
The ReFS system, or the resilient system,. Is a move file system that was introduced with Server 2012. It offers unlimited file and directory sizes this is really important for the virtualization capabilities of Server 2012. It also eliminates the need to run error checking on your data when you move it from the hard drive or to the hard drive. However, ReFS does not support file compression, EFS, the Encrypted File System, or disk quotas. Finally, ReFS can only read by Server 2012.
Any older operating systems are unable to view the ReFS file system.
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