Any data is written to the mirrored volume is, in fact, written to both disk drives such that if one disk drive fails the data will still be available on the other disk. The remainder of this chapter assumes that the disks in question have been converted from basic disks to dynamic disks. For details on performing this task refer to the initial sections of the Creating and Managing Simple and Spanned Volumes on Windows Server chapter of this book.
In this section a mirrored set will be created using two similarly sized disk drives connected to a Windows Server system. Begin the process by invoking the Disk Management snap-in. This can be achieved by typing compmgmt. The system used in this example contains three disks numbered 0, 1 and 2 respectively. Disk 0 is the system disk and disks 1 and 2 will be used to create a mirrored set. Within the Disk Management tool right click on the unallocated space in the graphical view of the first disk to be used in the mirror set and select New Mirrored Volume Click Next on the welcome screen to proceed to the disk selection screen.
As mentioned previously, a mirrored set must be comprised of two disk drives. Initially, the wizard only lists the currently selected disk in the Selected column. In order to proceed, one more disk is required. To add a disk to the mirrored set, select a suitable disk from the available disks in the left hand column and click on Add to add it to the selected disks list:.
With the necessary disks selected click Next to proceed and assign a drive letter or mount point for the volume. The Next button will then proceed to the Format Volume screen where the file system type and compression options may be selected. To view the summary screen, press the Next button. Assuming the summary is acceptable the Finish button will format the volumes and create the mirrored volume ready for use.
This may be launched either from a command prompt window, or from the Run dialog simply by entering diskpart at the prompt.
The first step in creating a mirrored set using diskpart is to identify the disks to be used. This can be achieved using the list disk command:. For the purposes of this tutorial we will be creating a mirrored volume based on a set consisting of disks 1 and 2. The mirrored volume is created by first creating a simple volume on the first disk and then adding a second disk to the mirrored set. So it is true that Software RAID status will not be show in the event log, even in the event of a failure.
Looks like it was tested with , but will probably work with as well. To continue this discussion, please ask a new question. Get answers from your peers along with millions of IT pros who visit Spiceworks. Windows Server Popular Topics in Windows Server. Which of the following retains the information it's storing when the system power is turned off?
Submit ». Ghost Chili. Pure Capsaicin. RAID 5 consists of three or more volumes each located on a separate physical disk. Under RAID 5, not only are the data stripes written, but also parity information relating to the data.
The key to RAID 5 fault tolerance is the fact that the parity information for a particular data stripe is always written to a different drive from the drive containing the corresponding data stripe. This means that if a disk fails, the corresponding parity information stored on another disk can be used for error detection and data correction also referred to as regeneration.
Whilst RAID 5 has considerable advantages over RAID 0 there are one or two drawbacks that should be taken into consideration when considering this storage option. Firstly, there is the inevitable performance overhead inherent in calculating and storing parity information for each data stripe written to disk. Secondly, the loss of more than one disk in a RAID 5 array will leave insufficient parity data on the remaining disks to regenerate the original data.
That said, RAID 5 does provide considerable advantages that generally outweigh the disadvantages. This is accessed either from the Server Manager or Computer Management tools. To launch the Server Manager, open the Start menu and click on the Server Manager option, or click on the Server Manager icon in the task bar.
In all cases the Disk Management tool can be found under the Storage category. As previously noted, RAID 5 implementation requires a minimum of 3 disk drives.
For the purposes of this tutorial a system containing four disk drives is assumed. In this scenario, disk 0 is the system disk and disks 1 through 3 are available for use in the RAID 5 configuration. Assuming these prerequisites are met the first step is to right click on one of the 3 disks in the Disk Management graphical view. On the wizard's welcome page click on the Next button to proceed to the Disk Selection screen. This screen contains a list of disk drives available for inclusion in the disk array together with a list of selected disks.
Currently only the current disk is included in the Selected list.
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