Does this still apply? http://citadel.org/doku.php/faq:systemadmin:how_may_i_improve#how.may. i.improve.performance.by.placing.the.databases.and.or.database.logs.on.separat e.disk.subsystems
That file is still going to be valid I assume (since it would be foolish to put the file which tells you where the DB is, in the DB) ... but I am just checking.
