3.3 – RAID 1

Question 1

RAID 1

Answer 1

–Provides data protection by mirroring data across 2 disks

Question 2

RAID 1

Disk Mirroring

Answer 2

actively duplicates bits across 2 disks to prevent data loss

—Writes on 1 disk, copy to 2nd disk

Question 3

RAID 1

Advantages

Answer 3

–Data Protection
—One disk fails- NO data loss

–Only 2 disks are required
—-More disks will increase protection but NOT capacity & performance

–NO performance lost if disk fails

–Fast recovery

Question 4

RAID 1

Disadvantages

Answer 4

–MAX storage capacity limited to the size of a single disk
—-One disk storage & one for protection

–Buy 1 TB & 1 TB = seen as 2 TB but same data copied