CertiGuide to Network+  9  Chapter 0110: Network Operating Systems (NOS)       9  IX  RAID (Server Disk Arrays)

IX  RAID (Server Disk Arrays) 1 RAID 1

This level of RAID has no fault-tolerance!

To setup RAID 0, a minimum of two drives are required. Data is written in small pieces spread across each drive.

The advantage of RAID 0 is more than one physical device can be used to read data. When two or more physical devices are feeding the same amount of data, it is faster than if one device was doing the same amount of work. This level of RAID is sometimes called striping, because the data is written in “stripes” across a series of disk drives.

The down side is that if one drive fails, the data on both drives is inaccessible. This means that RAID 0 is most useful when data is relatively static, and your backups are kept up to date. An example of this would be a catalog of information that is being made available on a web site.

If a drive failure takes place, restoring from tape is all that would be required.

IX  RAID (Server Disk Arrays) 1 RAID 1