CompTIA A+ 1101 RAID

Question 1

• requires at least 2 drives
• evenly splits data
• high performance
• no redundancy

Answer 1

RAID 0 - Striping

Question 2

• file blocks are duplicated between 2 or more physical drives
• high disk utilization (doubled)
• high redundancy

Answer 2

RAID 1 - Mirroring

Question 3

• file blocks are striped (like RAID 0), along with a parity block
• requires at least 3 disks
• efficient use of disk space, since files aren’t duplicated
• parity is spread across drives
• high redundancy
• parity calculation may effect performance

Answer 3

RAID 5 - Striping with Parity

Question 4

• the speed of striping, the redundancy of mirroring
• requires at least 4 drives

Answer 4

RAID 10 (1+0) - A Stripe of Mirrors