easyRAID E6, User Manual

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1-8
Introduction
RAID Level 3 technology use a dedicated parity disk to store
redundant information about the data on several data disks.
RAID Level 3 is an excellent choice for applications which require
single stream I/O with a high data transfer rate.
RAID Level 3 is optimal for applications in which large block of
sequential data must be transferred quickly, these applications are
usually of one of these types :
They operate on large data objects such as graphical image
processing, CAD/CAM files, and others.
They are non-interactive applications that process large data
sequentially.
They usually request a large amount of data (32KBytes or more) with
each I/O request.
RAID Level 3 :
" Parallel Transfer Disks with Parity
"
High Data Reliability & Highest Transfer Capacity
Disk 1 Disk 2 Disk 3 Disk 4 Disk 5 Disk 6
Physical
1
6
11
2
7
12
3
8
13
4
9
14
5
10
15
P
P
P
Data
1
2
3
4
5
6
7
8
9
10
11
12
Disk Array Controller
Array Management Software
Provides Logical to Physical Mapping
P : Parity