A.2 raid 0 – Accusys ExaRAID GUI User Manual
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Appendix
A-3
A.2 RAID 0
RAID 0 links each drive in the array to form one large drive. Storage
capacity is determined by the smallest drive in the array. This capacity is
then applied to format all other drives in the array. When using a 40GB,
50GB and a 60GB drive in a RAID 0 array, your system will effectively have
a single 120GB drive (40GB x 3).
The following diagram illustrates writing data to a RAID 0 array composed
of four HDDs connected to the controller. Data blocks are distributed
across all disks in the array.
RAID 0: Striped disk array without fault tolerance
Characteristics
• Storage capacity = (number of disks) x (capacity of the smallest disk)
• A minimum of two disks are required.
• Fault tolerance: No
• RAID 0 implements a striped disk array, the data is broken down into blocks
and each block is written to a separate disk drive.
• I/O performance is greatly improved by spreading the I/O load across many
channels and drives.
• No parity calculation is required, freeing up system resources.
• Fastest and most efficient array type but offers no fault tolerance.
Recommended use
• Video production and editing
• Image editing
• Pre-press applications
• Any application requiring high bandwidth
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CONTROLLER
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Figure A-1 RAID 0 disk array