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RAID Volumes
Joining multiple drives makes
a volume. The total of multiple physical drives are joined
as one logical volume. A volume is an easy way to extend
storage when running low on drive space. For example, your sales
database is getting full and you need to quickly create more space with
a minimum of downtime. Searching all available drive space on the network
we see several drives on different machines have the needed space available.
By adding these drives to the system as though they were one physical
drive we can create a volume that appears as one drive. The concept
of joining physical drives into a logical volume is not supported by
all OS’s. Some OS’s that support logical volumes include
Windows 2000 and some UNIX versions.
 Volumes
If one physical drive fails, then all data on the entire volume is toast. If the volume consists of multiple physical drives, then even the data on the physical drive that did not fail, becomes inaccessible.
To get the largest single amount of space use a volume.
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