Raid Devices

RAID 0 Stripe

It’s vulnerable to the data loss!!!

• All of the drives are added together (ex 40 GB)
  • High space composite
  • When u write a file to the disc array quarter of the files go to each disk
    • Extremly fast reads and writes

RAID 1 Mirrored Array

Very good agaisnt data loss

• Every single drive is a mirror of the other drives
  • No speed increase
  • No storage increase

Raid 5

Best of both worlds >

• Storage
• The total number of drives - one drive
• Each drive has parity section
  • Which stores the small part of each data
• Fast read and writes
• U’re able to lose one drive
  • U can restore the faild one