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RAID CALCULATOR

RAID stands for Redundant Array of Independent Disks. RAID is a method of combining several hard drives into one unit. It offers fault tolerance and higher throughput levels than a single hard drive or group of independent hard drives.

RAID CALCULATOR

RAID stands for Redundant Array of Independent Disks. RAID is a method of combining several hard drives into one unit. It offers fault tolerance and higher throughput levels than a single hard drive or group of independent hard drives.

Raid Disk Space Calculator

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Size of Each Drive
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Select Your Raid Configuration Read more about Raid Configurations

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RAID 0 (STRIPE)

RAID 0 splits data across drives, resulting in higher data throughput. The performance of this configuration is extremely high, but a loss of any drive in the array will result in data loss. This level is commonly referred to as striping.

Minimum number of drives required: 2

Performance: High

Redundancy: Low

Efficiency: High

ADVANTAGES:

  • High performance
  • Easy to implement
  • Highly efficient (no parity overhead)

DISADVANTAGES:

  • No redundancy
  • Limited business use cases due to no fault tolerance

 

RAID 1 (MIRROR)

Raid_01

Raid_1

RAID 1 writes all data to two or more drives for 100% redundancy: if either drive fails, no data is lost. Compared to a single drive, this mode tends to be faster on reads, slower on writes. This is a good entry-level redundant configuration. However, since an entire drive is a duplicate, the cost per megabyte is high. This is commonly referred to as mirroring.

Minimum number of drives required: 2

Performance: Average

Redundancy: High

Efficiency: Low

ADVANTAGES:

  • Fault tolerant
  • Easy to recover data in case of drive failure
  • Easy to implement

DISADVANTAGES:

  • Highly inefficient (100% parity overhead)
  • Not scalable (becomes very costly as number of disks increase)
RAID 0+1 (STRIPE + MIRROR)
Raid_01

RAID 0+1 is a mirror (RAID 1) array whose segments are striped (RAID 0) arrays. This configuration combines the security of RAID 1 with an extra performance boost from the RAID 0 striping.

Minimum number of drives required: 4

Performance: Very High

Redundancy: High

Efficiency: Low

ADVANTAGES:

  • Fault tolerance
  • Very high performance

DISADVANTAGES:

  • Expensive
  • High Overhead
  • Very limited scalability

 

RAID 5 (DRIVES WITH PARITY)
Raid_5

RAID 5 stripes data at a block level across several drives, with parity equality distributed among the drives. The parity information allows recovery from the failure of any single drive. Write performance is rather quick, but because parity data must be skipped on each drive during reads, reads are slower. The low ratio of parity to data means low redundancy overhead.

Minimum number of drives required: 3

Performance: Average

Redundancy: High

Efficiency: High

ADVANTAGES:

  • Fault tolerant
  • High efficiency

DISADVANTAGES:

  • Disk failure has a medium impact on throughput
  • Complex controller design
RAID 6 (DRIVES WITH DOUBLE PARITY)
Raid_6

RAID 6 is an upgrade from RAID 5: data is striped at a block level across several drives with double parity distributed among the drives. As you have with 5, parity information allows recovery from the failure of any single drive. The double parity gives 6 additional redundancy at the cost of lower write performance (read performance is the same), and redundancy overhead remains low.

Minimum number of drives required: 4

Performance: Average

Redundancy: High

Efficiency: High

ADVANTAGES:

  • Fault tolerant – increased redundancy over RAID 5
  • High efficiency
  • Remains a great option in multi-user environments which are not write performance sensitive

DISADVANTAGES:

  • Write performance penalty over RAID 5
  • More expensive than RAID 5
  • Disk failure has a medium impact on throughput
  • Complex controller design
RAID 10 (MIRROR + STRIPE)
Raid_10

RAID 10 is a striped (RAID 0) array whose segments are mirrored (RAID 1). This mode is a popular configuration for environments where high performance and security are required. In terms of performance it is similar to RAID 0+1. However, it has superior fault tolerance and rebuild performance.

Minimum number of drives required: 4

Performance: Very High

Redundancy: Very High

Efficiency: Low

ADVANTAGES:

  • Extremely high fault tolerance (under certain circumstances, RAID 10 array can sustain multiple simultaneous drive failures)
  • Very high performance
  • Faster rebuild performance than 0+1

DISADVANTAGES:

  • Very Expensive
  • High Overhead
  • Limited scalability

 

RAID 50 (PARITY + STRIPE)
RAID_50

RAID 50 combines RAID 5 parity and stripes it as in a RAID 0 configuration. Although high in cost and complexity, performance and fault tolerance are superior to RAID 5.

Minimum number of drives required: 6

Performance: High

Redundancy: High

Efficiency: Average

ADVANTAGES:

  • Higher fault tolerance, better performance and higher efficiency than RAID 5

DISADVANTAGES:

  • Very Expensive
  • High Overhead
  • Limited scalability

 

RAID 60 (DOUBLE PARITY + STRIPE)
RAID_60

RAID 60 combines RAID 6 double parity and stripes it as in a RAID 0 configuration. Although high in cost and complexity, performance and fault tolerance are superior to RAID 6..

Minimum number of drives required: 8

Performance: High

Redundancy: High

Efficiency: Average

ADVANTAGES:

  • Higher fault tolerance than RAID 6
  • Higher performance than RAID 6
  • Higher efficiency than RAID 6

DISADVANTAGES:

  • Very Expensive
  • Very complex / difficult to implement

 

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Server and workstation solutions engineered to meet your platform, storage and network requirements. Get on top of trends and take action while the competition is still booting up.

FINANCE

Low latency, high speed solutions for your financial computing and High Frequency Trading (HFT) needs.

HOSTING / CLOUD

We offer systems that are optimized for scale-out, high performance at maximum density and efficiency to lower Total Cost of Ownership (TCO).

STORAGE

Secure, reliable and powerful storage solutions.

MEDIA & ENTERTAINMENT

Wokstation and server solutions engineered based on your specific application and workflow, to provide you with peak performance. 

APPLIANCE DESIGN

Our expert engineering team will work to make your hardware appliance a natural representation of your brand.

HPC

We build, integrate, test, deploy and support HPC clusters to address all your HPC requirements. With the right system configuration, HPC can transform your business capabilities.

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