Chapter 1. Introducing the 3ware® 9000 Series Controller
6 3ware Serial ATA RAID Controller User Guide
Available RAID Configurations
The following RAID levels and configurations are available for drives
attached to a 3ware RAID controller:
• RAID 0
• RAID 1
• RAID 5
• RAID 10
• RAID 50
• Single Disk
• JBOD
• Hot Spare
RAID 0
Provides striping, but no mirroring or redundancy of any kind. Striped disk
arrays achieve high transfer rates because they can read and write data on
more than one drive simultaneously. The stripe size is configurable in the
3ware BIOS Manager (3BM) and in the 3ware Disk Manager (3DM 2).
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.
Figure 1. RAID 0 Configuration Example
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