[Jiasuba] describes raid functions and usage

I don't know how much raid works. Raid's most famous feature is its fast and stable hardware raid solution, which can effectively provide high levels of Hard Disk availability and redundancy, however, there are also some disadvantages, and the high price is awesome. Fortunately, Windows 2003 provides embedded software raid functions, and supports raid-0, raid-1, and raid-5. Soft Raid is not only easy to implement, but also saves a lot of valuable money.Windows2003 Server is a very practical new function. Raid-5Download Windows 7A volume is a fault-tolerant volume that disconnects data and parity among three or more physical disks.

If a part of the physical disk fails, we can use the remaining data and parity to re-create the data on the part of the disk that failed to be created. Raid-5 is a good solution for data redundancy in most computer environments where data is read. You can use a hardware or software-based solution to create a raid-5 volume. Using hardware-based raid, the smart disk controller processes the creation and re-generation of redundant information on a raid-5 volume disk.

Windows Server 2003 family operating systems provide software-based raid. The information on the raid-5 volume disk is created and regenerated by "disk management, in both cases, data is stored across all the members in the disk array. Of course, the performance and efficiency of Soft Raid cannot be compared with that of hard raid. Next we will talk about how to create a dynamic disk, how to implement Soft Raid on Windows 2003 Server, and how to manage Soft Raid.

Create a Dynamic Disk

When Windows 2003 Server is installed, the hard disk is automatically initialized as a basic disk. Instead of creating a volume set, strip set, or raid-5 group in a basic disk partition, we can only create similar disk configurations on a dynamic disk. To create a raid-0, raid-1, or raid-5 volume, you must use a dynamic disk. After Windows 2003 Server is installed, you can use the Upgrade Wizard to convert them to dynamic disks.

After converting a disk from a basic disk to a dynamic disk, the disk will contain volumes instead of disk partitions. Each volume is a logical part of the hard drive. You can also specify a drive letter or mount point for each volume. However, you must note that you can only create a volume on a dynamic disk. Dynamic disks have the following advantages over basic disks:

Volumes can be expanded to include non-adjacent spaces that can be stored on any available disk. There is no limit on the number of volumes that can be created on each disk.

In Windows 2003, dynamic disk configuration information is stored on the disk, rather than in the registry or other locations. At the same time, the information cannot be accurately updated. Windows 2003 copies the disk configuration information to all other dynamic disks. Therefore, damage to a single disk does not affect data on other disks.

A hard disk can be either a basic disk or a dynamic disk, but not both, because multiple Storage types cannot be combined on the same disk. However, if the computer has multiple hard disks, you can configure each hard disk as either basic or dynamic.

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