Blackboard Learn initially installs three databases and three database users. This topic reviews the databases and database users of Blackboard Learn. Administrators should not add data directly to the database or modify data in the database directly. Doing so may create serious problems in the system.
Direct access to databases is usually a privilege of DBAs and not end-users. Nonetheless, end-users have to access DBs in certain situations like generating sales reports, making ad-hoc queries, exporting data into spreadsheets and so on.Mar 23, 2015
Later, optical disc drives and flash memory units are also classified as DASD. The term DASD contrasts with sequential access storage device such as a magnetic tape drive, and unit record equipment such as a punched card device.
A direct-access storage device (DASD) is another name for secondary storage devices that store data in discrete locations with a unique address, such as hard disk drives, optical drives and most magnetic storage devices.