RAID0 vs. RAID1 - comparison table

RAID 0

RAID 1

Description

Data Striping

Data Mirroring

Drives

2 or more

2 identical drives

Storage Capacity

Sum of all drive capacity

1 drive capacity

Data redundancy (backup)

None

Available

Data transfer write rate

Increased

Not improved

Data transfer read rate

Not Improved

Increased

Major advantage

Allows operating system to see 1 large capacity drive

Provides ongoing protection in case of hard drive failure

Major disadvantage

If one drive fails, data on all drives in RAID array is lost

Cost of hard drive storage is doubled w/o increase is space