I was on the phone today with a remote site backup provider and they talked about using Volume Shadowing Service to make a fast database-aware backup. They said that in order for this to work, it would help to have a database that was backup aware, that the backup could Quiesce so that no new transactions would be allowed during the backup, but all in progress transactions would either be written to the log until the backup was complete, or be allowed to complete.
Does MS-Access support this? If so which versions?