DASD is an acronym for Direct Access Storage Device. DASD is a secondary storage device (fixed and removable) where each physical record has a discrete storage location. The acronym was coined by IBM to designate disks, magnetic drums and data cells which also includes optical disc drives.
DASDs can be accessed,
Directly
Sequentially
Using Index
Randomly
Hard Disk Drives (HDD) are DASDs.
DASDs can be accessed,
Directly
Sequentially
Using Index
Randomly
Hard Disk Drives (HDD) are DASDs.
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