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RAID stands for Redundant Array of Independent Disks. A RAID array is composed of multiple hard drives controlled by a RAID controller card. This allows the computer to view several hard drives as one or more drives depending on the RAID specification. The benefit of this storage system is increased speed and security of data. The use of a hot spare drive encreases safety even further by giving the RAID array a safety net: Should one drive in the array fail, the hot spare takes over. (Does not work in RAID 0)
RAID can be set in a number of different levels, however levels 0,1,5, and 10 are the most common. The functionality of each level is as follows:
Level 0 - Two hard drives viewed by computer as 1. Data is sent to both hard drives in a stripe allowing faster read/write times. The downside of this is that if one drive fails for any reason, your data is lost.
Level 1 - Two hard drives are used with Drive B being an exact copy of Drive A. This does not increase read/write speed, but adds a layer of safety to data storage. If a hot spare is used, 2 drives can fail before the data is lost. This is one of the safest RAID levels and is recommended and implemented by Justservers.com in many of the machines we build.
Level 5 - RAID 5 uses striping (RAID 0) along with parity information to provide fast secure data storage. Used with a minimum of 3 drives, RAID 5 provides inexpensive redundant storage solutions, especially when configured with a hot spare hard drive. Justservers.com highly recommends RAID 5 in any configuration that can support it.
Level 10 - RAID 10 is actually a combination of levels 0 and 1. RAID 10 provides better performance than RAID 1, but generally costs a bit more. This is an excellent choice for call recording systems.
Not just anyone can build a good RAID storage system. If you want a RAID system you can rely on, choose Justservers.com to build you a RAID system you can trust. Contact us today and let Justservers.com build your perfect custom server.
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