RAID — Explained in 5 mins

What is RAID and its types ?
RAID is used to store same data across multiple hard disks to avoid the data loss and also to improve performance.

Mostly commonly used types are,

• RAID 0
• RAID 1
• RAID 5
• RAID 6
• RAID 10

Things to remember:

RAID 0:

• RAID 0 is ‘stripping’.
• Minimum 2 disks.
• There is no data redundancy.
• If the data is not important than the speed then we can use ‘RAID 0’
• Example: We can use RAID 0 for SWAP Partition.

RAID 1:

• RAID 1 is Mirroring.
• Minimum 2 disks.
• RAID 1 is exact copy of another disk.
• It has data redundancy
• But write speed is low when compared to ‘RAID 0’

RAID 5:

• RAID 5 is the combination of ‘Data Stripping’ and ‘Parity bit’
• Minimum 3 disks.
• It has data redundancy.
• If 1 hard disk failed then we can recover the data by…