After using 30 days SSD as adatastore suddenly SSD displaying as a device

Hi Every one.

                     I am using ESXi 5.0, i installed hyperviser in SSD 125GB hard disc. and i also add 1TB HDD hard disc.  i created VM's in SSD.

I am running this server from last 1month onwards. Now my ESXi server is running but SSD hard disc is showing 0.00gb means storage space is not displaying in vSphere Client. Some times that 0.00GB also not showing. But in storage adopters SSD is vi sibling like device[4th pic] and mounted [3rd pic].

SSD is displaying as device, It is not showing as data store. But SSD in VMFS system type only.

  Please help me regarding this,, I am repeatedly facing this problem.

Thanks for advance..

Venkata