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RAID Builder (find your RAID solution)
1. 2. Show RAID options

RAID 5 "Stripe with Parity"
Speed, Large Storage, & Redundancy.

  • 3 or more drives
  • RAID array shows up as a single volume on the desktop.

Perfect For

Anyone wanting the speed and large capacity of striping, but with the protection of mirroring.
  • Store music, photos, videos
  • Anything that takes time to create
  • Anything that is difficult to replace
  • Anyone needing faster data rates

Speed & Protection

With RAID 5, data is striped for speed like a RAID 0, but a duplication or parity is built in to protect your data from a single drive failure. This results in fast performance comparable to a RAID 0, but with the added benefit of protection.

Optimized Storage Space

The storage space resulting from a RAID 5 array is:
the sum of all the drives put together minus one drive worth of space.

How the Data is Distributed

RAID 5 incorporates striping of data just like in a RAID 0 array, however, in a RAID 5 there are redundant pieces of the data that are also distributed across the drives and are referred to as parity. Having the parity blocks staggered across each drive allows any single drive in the RAID 5 array to fail without any data loss.

In the illustration below there are 4 drives set up as a RAID 5.
Each colored square is a "block" of data. All blocks are the same size.

  • The first data block of the mp3 file is represented as:
  • The second data block is represented as:
  • And the third data block is represented as:
Each of those three data blocks have a certain number of bits that are 1's & 0's. Those values are then summed up as a value on the parity block represented by on Drive 4. Like an algebraic equation, you can solve the equation when you have a missing piece, in this case a missing piece would occur when you have a failed drive.

  • Definitions:
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RAID 0 (Stripe)
Data is split into blocks over two or more drives at same time for high speed and large capacity.
Capacity
blue meter 4
Data Safety
orange meter 1
Performance
green meter 4
RAID 1 (Mirror)
Data is written at same time to two drives only for highest level of data safety and redundancy.
Capacity
blue meter 1
Data Safety
orange meter 4
Performance
green meter 14
RAID 10 (1+0)
Data is Striped (RAID 0) over two Mirrored sets (RAID 1) of drives for fast redundancy.
Capacity
blue meter 2
Data Safety
orange meter 4
Performance
green meter 2
RAID 5 (Stripe with Parity)
Data is Striped (RAID 0) while incorporating parity over three or more drives for the best combination of speed, capacity, and redundancy.
Capacity
blue meter 3
Data Safety
orange meter 3
Performance
green meter 3
JBOD
(Just a Bunch Of Disks/Drives)
Each disk shows up as an individual logical volume on the computer. A 4 bay unit populated with drives will have 4 logical drives show up on the computer.
Capacity
blue meter 4
Data Safety
orange meter 1.5
Performance
green meter 1
Span (N-RAID)
Combines capacity of two or more drives of varying size without any RAID data distribution scheme into one logical desktop volume.
Capacity
blue meter 4
Data Safety
orange meter 1.5
Performance
green meter 1