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Chapter 4
RAID SETTINGS
User's Manual |
CMS330-Q470E/H420E
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Chapter 4
RAID SETTINGS
Chapter 4 - RAID
The system board allows configuring RAID on Serial ATA drives. It supports RAID 0, RAID 1,
RAID 5, RAID 10. (Q470E)
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RAID Levels Explanation
RAID 0 (Striped Disk Array without Fault Tolerance)
RAID 0 uses two new identical hard disk drives to read and write data in parallel, interleaved
stacks. Data is divided into stripes and each stripe is written alternately between two disk
drives. This improves the I/O performance of the drives at different channel; however it is not
fault tolerant. A failed disk will result in data loss in the disk array.
RAID 1 (Mirroring Disk Array with Fault Tolerance)
RAID 1 copies and maintains an identical image of the data from one drive to the other drive.
If a drive fails to function, the disk array management software directs all applications to the
other drive since it contains a complete copy of the drive’s data. This enhances data protection
and increases fault tolerance to the entire system. Use two new drives or an existing drive and
a new drive but the size of the new drive must be the same or larger than the existing drive.
RAID 5
RAID 5 stripes data and parity information across hard drives. It is fault tolerant and provides
better hard drive performance and more storage capacity.
RAID 10 (Mirroring and Striping)
RAID 10 is a combination of data striping and data mirroring providing the benefits of both
RAID 0 and RAID 1. Use four new drives or an existing drive and three new drives for this con-
figuration.
RAID Level
Min. Drives Protection
Description
RAID 0
2
None
Data striping without redundancy
RAID 1
2
Single Drive Failure
Disk mirroring
RAID 5
3
Single Drive Failure
Block-level data striping with
distributed parity
RAID 10
4
1 Disk Per Mirrored
Stripe (not same mirror)
Combination of RAID 0 (data striping)
and RAID 1 (mirroring)
SPAN
2
None
Extends capacity to the sum of total
drives, the second drive won't be used
until the first one is full.
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Setup Procedure
To enable the RAID function, the following settings are required.
1. Install SATA drives.
2. Enter the RAID menu
3. Create RAID 0/RAID 1/SPAN
Step 1: Install SATA Drives
Refer to chapter 2 for details on connecting the Serial ATA drives.
Step 2: Enter the RAID Menu
1. Power-on the system then press 'Ctrl-R' to enter the RAID menu.
Important:
1. Please make sure the SATA drives that you are to create a RAID volume with
are connected and powered, and are able to be detected by the system. Other-
wise, the RAID BIOS utility would not be accessible.
2. While creating a RAID volume, please make sure the system, drives, and cables
are perfectly steady and mounted correctly. Disturbance during creating a
RAID volume will result in irreversible data corruption sorted on the drive.
