Question : SQL Server file proportions

I'm setting up a multi disk SQL environment.  There will be separate storage for the data, log, and temp files.  What disk size proportions do I need to plan for if my database is, for example 1TB?

Data Disk = 1TB
Log Disk = ???
Temp Disk = ???

Answer : SQL Server file proportions

1TB for Log Disk (because when you rebuild the indexes, the size log growing very fast).
Temp Disk: you can create it with 30 ~ 40% from your data disk (The size of tempdb depends of the your application - if you will use a lot of cursors, temp tables, order by clause, group by clause, etc...).