Do you understand the Concept’s of RAID?

The acronym RAID means Redundant Array of Independent (or Inexpensive) Disks. RAID contains different level of RAID version is defined, each providing different trade-offs in features and performance.

There are two main purposes of RAID Technology:-

a)  Method of storing the same data in different areas

b)  Speed up and stabilize your computers performance.

RAID is not necessarily easy to install and maintain on your own computer system, and some of the people think why it’s required and don’t know how effective the technology is for every organization, If you could assume that had a hard drive crash, you know how costly in time and effort it is to restore the data on that hard drive. So if we are using RAID technology with your hard drive there is no need to restore your data and application because it already getting redundant on other hard drives which is in process at the back. So you can think what the effectiveness of RAID on your time and money to restore your data and application.

What Types of RAID Are Available?

There are a number of variations of RAID; every RAID has their own functionality, advantages and disadvantages.

1.  RAID Level 0 is based on a method and it’s called striping, as per RAID 0 functionality is concerned that is segmenting the data on your computer into smaller chunks of data that are placed across all available disk drives, and that smaller packets of data scattered across a number of drives can be very quickly pulled together into a coherent whole.

2. RAID Level 1 introduces the benefit of mirroring or copying all of your data onto at least one another drive, perhaps even onto many other drives. This ensures that your data will be duplicated in whole on at least one other hard disk, so if your data is lost in a disk failure, there is at least one extant copy immediately available.

The biggest disadvantage to RAID 1 is the cost of having additional disk drives containing the mirror of your data.

3. Combination of RAID Levels 0 and 1

This is the combination as under the functionality or features of RAID 0 and 1. This combination offers the best of both worlds. The main functionality of this is redundancy of your data and improving performance.

4.  RAID 5 is often viewed as the ideal mix of good performance, good fault tolerance, high capacity and storage efficiency. Reason being that RAID 5 stripes both data and parity information across three or more drives.

Instead of mirroring data, RAID 5 stores parity (error-checking) information. If there’s an error or bit corruption, the parity data should catch it, and the RAID controller should correct.  Is RAID Hardware Better Than RAID Software?


This entry was posted on Tuesday, July 21st, 2009 at 9:13 am and is filed under Dedicated Server. You can follow any responses to this entry through the RSS 2.0 feed. You can leave a response, or trackback from your own site.

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