Reconfiguration of the Hard Drive

You should allocate at least three physical disk drives to your Cognos® Transformer system, subdividing the processing as follows:

• Drive 1: operating system and the cogtr program
• Drive 2: Cognos Transformer DataWorkDirectory
• Drive 3: Cognos Transformer ModelWorkDirectory and CubeSaveDirectory

The log file for this configuration reads as follows, where 1, 2, and 3 represent drives c, d, and e:

LogFileDirectory=c:\transformer\logs\
ModelSaveDirectory=c:\transformer\models\
DataSourceDirectory=c:\transformer\data\
CubeSaveDirectory=e:\transformer\cubes\
DataWorkDirectory=d:\temp\
ModelWorkDirectory=e:\temp\

If you do not specify processing directories, Cognos Transformer defaults to the IBM® Cognos default directories.

You may also want to configure the build server to use striping (RAID level 0) rather than mirroring, assuming that you have a backup for use if the system crashes during a production build. The build time is reduced because data is distributed among nonredundant disk drives.