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Common Causes for
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RAID Configurations: Software RAID
Types of RAID Configurations
Software RAID
A software RAID uses the configuration software provided with the operating system to create a RAID 0, RAID 1, or RAID 5 volume on dynamic hard drives. Software RAIDs have lower performance than hardware RAIDs. One reason software RAIDs are used is because they are inexpensive and simple to configure. There are also no hardware requirements other than requiring multiple hard drives.
Hardware RAID
A hardware RAID uses the configuration software, which is provided by the RAID manufacturer, to group one or more physical hard drives into what appears to the operating system as a single hard drive. This is commonly referred to as a virtual disk or logical unit. When you create the virtual hard drive, you also select a RAID level. For this type of configuration, a server can be configured to use RAID 0 (also known as striped), RAID 1 (also known as mirrored), RAID 5 (also known as striped with parity), and in some servers, RAID 0+1 (also known as a mirrored stripe). Hardware RAIDs have better overall server performance.
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