Discover the truth about data storage options in mainframe systems. Learn whether data can be stored on both Direct Access Storage Devices (DASD) and magnetic tape volumes. Get a comprehensive explanation to help you excel in your Wipro Mainframe MySkillz Trendnxt assessment and advance your career.
Table of Contents
Question
Data can be stored on a direct access storage device (DASD) or magnitic tape volume.
A. True
B. False
C. Can’t say
D. None
Answer
A. True
Explanation
In mainframe systems, data can indeed be stored on both Direct Access Storage Devices (DASD) and magnetic tape volumes.
Direct Access Storage Devices (DASD) are a type of storage medium that allows direct access to data, meaning that the system can read or write data directly from or to any location on the device without having to sequentially search through the entire medium. Examples of DASD include hard disk drives (HDDs) and solid-state drives (SSDs). DASD is commonly used for storing frequently accessed data, as it provides faster access times compared to sequential access storage devices like magnetic tapes.
On the other hand, magnetic tape volumes are sequential access storage devices that store data on magnetic tape. Data is written and read sequentially, meaning that to access a specific piece of data, the system must start from the beginning of the tape and move forward or backward until it reaches the desired location. Magnetic tapes are often used for backup purposes, long-term data retention, and storing large amounts of data that are not frequently accessed, as they offer high storage capacity at a lower cost compared to DASD.
In mainframe environments, both DASD and magnetic tape volumes are used for different purposes. DASD is preferred for storing data that requires fast and frequent access, such as databases, application files, and system libraries. Magnetic tape volumes are used for backup, archival, and disaster recovery purposes, as well as for storing large datasets that are not frequently accessed.
Therefore, the statement “Data can be stored on a direct access storage device (DASD) or magnetic tape volume” is true in the context of mainframe systems.
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