Disk Space Error during installation of R12.1.1 on linux

Hi,

I have installed the linux(RHE4) through vmware on windows 7.

While installation of R12.1.1 following error message getting. How to resolve the same.

-- apps node space checks --
   Disk space on system acceptable:
   APPL_TOP = /r12/apps/oracle/PROD/apps/apps_st/appl
   required = 6005.0
   actual   = 24857.1328125
   Disk space on system acceptable:
   APPL_TOP mount 2 = /r12/apps/oracle/PROD/apps/apps_st/appl
   required = 3344.0
   actual   = 18852.1328125
   Disk space on system acceptable:
   APPL_TOP mount 3 = /r12/apps/oracle/PROD/apps/apps_st/appl
   required = 8944.0
   actual   = 15508.1328125
   Disk space on system acceptable:
   APPL_TOP mount 4 = /r12/apps/oracle/PROD/apps/apps_st/appl
   required = 3646.0