# Database Device Locations and Sizes

On the Database Device Locations and Sizes dialog box you must specify the pathnames and sizes to create the database. The directory paths must exist. The installer will not create new directories.

## Database storage

This table lists a rough starting value for the size of the SQL Server table spaces. Consider the requirements based on your system sizing for optimal performance.

Tablespace | Initial size | Description
--- | --- | ---
Log | 2 GB | After a database crash, SQL Server can re-apply its transactions and bring the database data back to the state before the crash.
Data | Mnimal 20 GB | Space for data and indexes. See your sizing report for specific information about the initial size.