Noun
DASD (plural DASDs)
(computing) Initialism of direct access storage device, such as a USB drive or hard drive.
However, when the lock is obtained offboard of the TPF processor in the DASD control unit, an external process must be used. Source: Internet
Direct access storage devices (DASD) IBM 2311 disk drive. Source: Internet
In fact, only because of legacy support are smaller-than-4K DASD records still used. Source: Internet
In practice many customers use multiple mainframes linked either by Parallel Sysplex and shared DASD (in IBM's case), or with shared, geographically dispersed storage provided by EMC or Hitachi. Source: Internet
In this case, the control program would be equally loaded into core and each program or record on DASD could be potentially accessed by either mainframe. Source: Internet
Modern DASD used in mainframes only very rarely consist of single disk-drives. Source: Internet