Advanced Data Guarding User Guide

C-2 Advanced Data Guarding for the Smart Array 5300 Controller Reference Guide

Compaq Confidential – Need to Know Required

Writer: John Turner Project: Advanced Data Guarding for the Smart Array 5300 Controller Reference Guide Comments: final draft

Part Number: 188270-xx1 File Name: g-appC Reliability Data.doc Last Saved On: 12/11/00 12:05 PM

1E-11

1E-10

1E-09

1E-08

1E-07

1E-06

1E-05

0.0001

0.001

0.01

0.1

1 6 11 16 21 26 31 36 41 46 51 56

Total number of physical drives in array

Relative likelihood of logical drive failure .

RAID 0

RAID 5

RAID 0+1

RAID ADG

Figure C-1. Probability of logical drive failure for different RAID levels