RAID 4

What is RAID 4?

Definition and meaning of RAID 4

RAID 4 is a Redundant Array of Independent Disks (RAID) standard Configuration that Makes use of Block-level Records striPing and a Committed disk for storing Parity bits. It does not require synchronized spinning, and each disk capabilities independently whilst single Data bLocks are asked. This is in assessment to RAID 3, which stripes at block-level, as opposed to bit-level. RAID four is just like RAID 5, but RAID 4 does now not distribute parity bits. This configuration calls for at least three disks.

What Does RAID 4 Mean?

RAID 4 and RAID 5 are similar, however RAID four holds all parity bits in a single force. Data or documents may be allotted among a couple of, independently operating drives. This configuration helps parallel enter/Output (I/O) request overall perFormance. However, whilst parity bits are saved in a unmarried pressure for every block of information, gadget bottlenecks may additionally result. When this takes place, sySTEM performance depends on parity pressure overall performance.

RAID 4 benefits are as follows:

• Data block striping, which helps simultaneous I/O Requests
• Low garage overhead, which lowers as more disks are added
• Does now not require synchronized spindles or Controller

RAID 4 disadvantages are as follows:

• Parity drives might also cause bottlenecks
• Slow random writes, which result while a parity have to be separately written for every write

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