AMCC 9590SE-4ME Manual Do Utilizador

Chapter 1. Introduction to the 3ware Command Line Interface

10

Available RAID Configurations

The following RAID levels and configurations are available for drives 
attached to a 9590SE-4ME 3ware RAID controller: 

RAID 0

RAID 1

RAID 5

RAID 10

Single Disk 

Hot Spare

                                      

For how to configure RAID units, see “Configuring a New Unit” on page 34.

RAID 0 provides improved performance, but no fault tolerance. Since the 
data is striped across more than one disk, RAID 0 disk arrays achieve high 
transfer rates because they can read and write data on more than one drive 
simultaneously. The stripe size is configurable during unit creation. Requires 
a minimum of two drives.

When drives are configured in a striped disk array (see Figure 1), large files 
are distributed across the multiple disks using RAID 0 techniques. 

Striped disk arrays give exceptional performance, particularly for data 
intensive applications such as video editing, computer aided design and 
geographical information systems. 

RAID 0 arrays are not fault tolerant. The loss of any drive results in the loss of 
all the data in that array, and can even cause a system hang, depending on 
your operating system. RAID 0 arrays are not recommended for high 
availability systems unless additional precautions are taken to prevent system 
hangs and data loss. 

 You may notice mention of RAID 50 in the Command Syntax sections of the 

CLI Guide. RAID 50 requires six or more drives, and so is not available using the 
9590SE-4ME.