If you want to add more storage capability, the solution is to create a new RAID pool, which likely means starting over. And a third drawback about traditional RAID concerns drive failure: When a drive fails, many RAID software enter a state where data reduction will happen if a different drive falters until the user replaces the failed drive-again, leaving the user no opportunity to save his records until they are lost. Additionally, performance is affected when in this hampered state.
The volume of information that companies and people are going to have to handle is continually expanding. The days of understanding how much storage capacity you will need prior to buying a driveway are evaporating. Information updates so often that information storage capability has to have the ability to conform to the needs of the user.
Using RAID devices
This on-demand demand for data storage calls for better external drives. RAID drives will need to allow for users to add storage capability without having to change RAID levels or undergo complicated administration of pooling RAID groups. If you want to add storage capability, they should allow you to just insert additional disk drives or replace smaller disks with ones that have more capacity and automatically reconfigure.
If a drive happens to neglect, a RAID device should automatically synchronize data across remaining drives, returning data storage to a protected state. Data storage should be seamless, easy, and efficient. New external hard drives should facilitate secure data storage, and empower adjustable capability; there should be no requirement to buy another external drive or delete data just to make room.
RAID devices must also have a way of communication when user interaction is required, when the device is engaged in file transfer, just how much capacity is available, and if a drive needs to be replaced. A drive which, regardless of what you do, not reevaluate what it is you’re performing on your own system rather than prohibits access to data even while replacing drives will make information storage best.
For more information: the best external hard drive