Why DM to the hard drive low lattice from 40G to 1G

Q: A hard disk when the use of DM to the hard drive low-level format, restart the computer after the hard drive from the original 40GB into 1GB, how can not find the remaining 39GB space, please ask this is how to return?

A: The occurrence of this phenomenon is likely that you use a lower version of DM to the hard drive low-level format caused by, some of the lower version of DM software on the size of the low grid is limited, you can download the latest version of the DM, the hard disk to the low-level format operation, the problem can be solved.