RAID (Redundant Array of Independent Disks) is a technology that combines multiple physical drives into a single logical unit to improve performance, reliability, or both.
There are several common RAID levels, each offering different combinations of performance, redundancy, and capacity:
RAID 0 - Striping
RAID 1 - Mirroring
RAID 5 - Striping with Parity
RAID 10 (or RAID 1+0) - Mirrored Striping
RAID stands for Redundant Array of Disks.
RAID 0 - Striping
RAID 0 stripes data across multiple drives without redundancy.
Offers increased performance through parallel data access across drives.
Provides no data redundancy or fault tolerance.
Capacity: Total capacity is the sum of the capacities of all drives.
Best used for applications that prioritize performance over data protection, such as video editing and gaming.
RAID 0 uses striping to improve .
RAID 1 - Mirroring
RAID 1 mirrors data across multiple drives for redundancy.
Provides data redundancy by maintaining identical copies (mirrors) of data on each drive.
Offers fault tolerance, allowing the array to continue functioning even if one drive fails.
Capacity: Total capacity is equal to the capacity of the smallest drive in the array.
Best used for applications that require high data availability and fault tolerance, such as critical business data storage.
What is the primary purpose of RAID 1?
RAID 5 - Striping with Parity
RAID 5 stripes data across multiple drives and uses parity for fault tolerance.
Provides a balance of performance, capacity, and fault tolerance.
Distributes parity information across all drives, allowing the array to continue functioning even if one drive fails.
Capacity: Total capacity is the sum of all drives minus one drive (parity).
Best used for general-purpose storage environments that require a good balance of performance and redundancy.
RAID 5 can tolerate the loss of disk without data loss.
RAID 10 - Mirrored Striping
RAID 10 combines RAID 1 mirroring and RAID 0 striping for performance and redundancy.
Provides both high performance and fault tolerance by striping data across mirrored pairs of drives.
Capacity: Total capacity is half the sum of all drives.
Best used for environments that require high performance and fault tolerance, such as databases and virtualization platforms.
RAID 10 combines and mirroring for both performance and redundancy.
Which RAID level offers both performance improvement and data redundancy?
