The way disk is sold these days I would not worry about it too much. Buy the number of spindles you need to satisfy IO's per second requirements, and you are sure to have much more disk than needed. If you plan according to size, 2 1 Terabyte disks in a RAID 1 will probably do it. Performance will suffer accordingly. Jared On 10/16/07, John Dunn <JDunn@xxxxxxxxx> wrote: > > Does anyone have a spreadsheet/calculation for calculateing how much > space is required for database tables/indexes based up table size/no of rows > etc? > > > John > -- Jared Still Certifiable Oracle DBA and Part Time Perl Evangelist