I'm getting an error indicated as Raid 0 Volume. Can anyone advise what this is exactly?

Is there a solution? Do I need a new Hard Disk or something?

Any help would be much appreciated.

raid 0 is a striped array meaning 2 drives are used and the space of the 2 added together. If the array has broken then you will lose the data . check inside to see if there is at least 2 drives then enter the array properties (just after post it will give you the option) and see if there is anything there