That is right. Storage groups are gone!
Exchange 2010 has only mailbox databases and they are organizational objects in EMC. The mailbox databases are placed in the Organization Configuration ->Mailbox location in the console rather than the server level in exchange 2007. The database names has to be unique through out the exchange organization as well. This means that we can’t have duplicate mailbox database names like in 2007 (in different storage groups, of course).
As there are no storage groups, this will also mean that the database will have its own logs as well…
