An out of space error can occur during an IBM WebSphere sMash install even though the install UI indicated there was enough free space.
The IBM WebSphere sMash Installer is under-estimating the amount of hard disk space required to install sMash. This can result in an out of space error during the install even after the installation indicates you have enough free space.
The Windows install says it requires 201,571,852 bytes free, but it actually requires 220,000,000 bytes free.
The Linux install says it requires 157,221,491 bytes free, but it actually requires 477,400,000 bytes free.
The AIX install says it requires 170,206,978 bytes free, but it actually requires 506,896,384 bytes free.
Specific out of space error message is platform-dependent.
Resolving the problem
Free up additional space and re-run the install.