The Admin toolkit is a fully support Microsoft extension for WSS and MOSS and should be part of your standard server build.
x64: http://www.microsoft.com/downloads/details.aspx?FamilyId=F8EEA8F0-FA30-4C10-ABC9-217EEACEC9CE x86: http://www.microsoft.com/downloads/details.aspx?FamilyId=263CD480-F6EB-4FA3-9F2E-2D47618505F2
Several people have asked to see screen shots of the BSM feature so here they are.
Hi Ian, can we use this tool to split a site collection's DB? We have a single site collection and are reaching 100GB. Do you know of a way to have multiple DBs for a single site collection? Many thanks.
A site collection can't span databases. So you have to use stsadm -o export to get backup some of the subsites, then delete them from the site collection. Then you can create a new contentdb/site collection and import the deleted sites back in.