Dell EMC Server Administrator Storage Management 9.1

RAID level 5 (striping with distributed parity)

RAID 5 provides data redundancy by using data striping in combination with parity information. Rather than dedicating a physical disk to parity, the parity information is striped across all physical disks in the disk group.

Striping
Disks with Distributed Parity

RAID 5 characteristics:

  • Groups n disks as one large virtual disk with a capacity of (n-1) disks.
  • Redundant information (parity) is alternately stored on all disks.
  • When a disk fails, the virtual disk still works, but it is operating in a degraded state. The data is reconstructed from the surviving disks.
  • Better read performance, but slower write performance.
  • Redundancy for protection of data.