All notes
Raid

Intro

RAID: Redundant Array of Independent/Inexpensive Drives.

Summary

Ref.

This ref by Adaptec is a comprehensive intro to RAID.

RAID10

This ref recommends strongly RAID10 over RAID5.

RAID10 over RAID5

RAID LevelTotal array capacityFault toleranceRead speedWrite speed
RAID-10
500GB x 4 disks
1000 GB1 disk4X2X
RAID-5
500GB x 3 disks
1000 GB1 disk2XSpeed of a RAID 5 depends upon the controller implementation

RAID50

This article recommends RAID50 as a compromise between RAID10 (Capacity costly) and RAID5 (write slowly).