HP LH4r Installation and configuration of the HP NetRAID, NetRAID-1 and NetRAI - Page 33
Decision Tree for Choosing a RAID Level
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Chapter 2 Start Data Protection (Redundancy) No Required? Yes RAID Overview RAID 0 Complete Duplication Required? Yes No 2 Disks Number of Disk Drives? 4, 6, or 8 Disks RAID 1 RAID 10 Large, Serial Transfers Typical Data Transfers? Small, Random Transfers Number of Disk Drives? 3-5 Disks RAID 3 6 - 24 Disks RAID 30 Number of Disk Drives? 3-5 Disks RAID 5 6 - 24 Disks RAID 50 Figure 2-4. Decision Tree for Choosing a RAID Level 25
Chapter 2
RAID Overview
25
Data Protection
(Redundancy)
Required?
Complete
Duplication
Required?
Typical
Data
Transfers?
Number of
Disk Drives?
RAID 0
RAID 1
RAID 10
Large,
Serial
Transfers
Yes
Yes
No
No
Small,
Random
Transfers
Number of
Disk Drives?
RAID 3
RAID 30
3-5
Disks
2
Disks
4, 6, or 8
Disks
6 - 24
Disks
Number of
Disk Drives?
RAID 5
RAID 50
3-5
Disks
6 - 24
Disks
Start
Figure 2-4. Decision Tree for Choosing a RAID Level