HP Workstation xw6000 Adaptec SCSI RAID 2120S: Software User's Guide - Page 9

RAID-0, A RAID-1 must contain only two disk drives. All data stored on

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Introduction Adaptec RAID controllers support the following types of array: RAID-0 A RAID-0 is created by striping data across two or more disk drives. Simple striping like this creates no redundancy to protect the data, but by sharing the load equally across multiple drives, it does provide the best read and write performance of any RAID type. RAID-0 Drive Data 0 Data 3 Data 6 Data 9 Drive Data 1 Data 4 Data 7 Data 10 Drive Data 2 Data 5 Data 8 Data 11 RAID-1 A RAID-1 must contain only two disk drives. All data stored on the array is written to both drives. This duplication, or mirroring, of the data provides redundancy, ensuring that if one drive fails no data loss will occur. RAID-1 Drive Data 0 Data 1 Data 2 Data 3 Drive Data 0 Data 1 Data 2 Data 3 1-3

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1-3
Introduction
Adaptec RAID controllers support the following types of array:
RAID-0
A RAID-0 is created by striping data across two or more disk
drives. Simple striping like this creates no redundancy to protect
the data, but by sharing the load equally across multiple drives, it
does provide the best read and write performance of any RAID
type.
RAID-1
A RAID-1 must contain only two disk drives. All data stored on the
array is written to both drives. This duplication, or mirroring, of
the data provides redundancy, ensuring that if one drive fails no
data loss will occur.
Data 0
Data 3
Data 6
Data 9
RAID-0
Data 2
Data 5
Data 8
Data 11
Data 1
Data 4
Data 7
Data 10
Drive
Drive
Drive
Data 0
Data 1
Data 2
Data 3
RAID-1
Data 0
Data 1
Data 2
Data 3
Drive
Drive