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EasyRAID E6 Guide de l'utilisateur Page 15

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1-7
Introduction
RAID level 1 provides both very high data reliability and continued
data availability in the event of a failure of an array member. When
a RAID level 1 member disk fails, array management software simply
directs all application requests to the surviving member.
RAID level 1 is suitable for data for which reliability requirements are
extremely high, or for data to which high performance access is
required, and for which the cost of storage is a secondary issue.
RAID Level 1 : " Disk Mirroring " High Data reliability
Disk 1 Disk 2 Disk 3 Disk 4 Disk 5 Disk 6
Physical
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
1
2
3
Data
1
2
3
4
5
6
7
8
9
10
11
12
Disk Array Controller
Array Management Software
Provides Logical to Physical Mapping
Optional
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