RAID 5 Explained

RAID 5 Explained

RAID 5 (redundant array of independent disks) writes data across all disks in the volume and use a parity block for each data block.


  1. RAID 5 offers comparable performance to RAID 0 with the benefit of protecting data.
  2. Read data transactions are very fast while write data transactions are somewhat slower (due to the parity that has to be calculated).
  3. RAID 5 is a configuration that uses disk striping with parity. Because data and parity are striped across all of the disks, no single disk is a bottleneck. Stripping.


  1. If fails one-second disk before data can be rebuilt to the replacement hard drive, all information in the array will be lost.
  2. A minimum of three disks is required to create a RAID 5 volume.


Array Capacity: (Size of Smallest Drive) * (Number of Drives – 1).