Sun Solaris 10 installation disk layout:

/(root)        = 20000 Mbytes

/swap = 2500 Mbytes

/u01 = 10000 Mbytes Oracle10g mount point Solaris Slice

/export/home = what is left from 40 Gbytes (20+2.5+10 = 32.5) =>  6 Gbytes

RAM = 1Gbyte