Disk space full though there is enough disk space

Hi

I am installing ECC6. at a point it is throwing the following error

ERROR 2007-09-06 11:02:21

CJS-00091 Unable to create the tablespaces.<br>DIAGNOSIS: There is not enough free disk space: Mount point | space required | space available | SAPDATA directories E:/ | 193930 | 67539.6 | 1.<br>SOLUTION: Make more disk space available.

when i checked the diskspace

Local disk (E:) total size : 88.8 Gb free space 65.9Gb.

Can anyone please respond where the error has occured?