Device Management System Devices Sequential Access Storage Media Direct Access Storage Devices Components of I/O Subsystem Communication Among Devices Management of I/O Requests Paper Storage Media...




Device Management
System Devices
Sequential Access Storage Media
Direct Access Storage Devices
Components of I/O Subsystem
Communication Among Devices
Management of I/O Requests
Paper Storage Media
Magnetic Tape Storage
Magnetic Disk Storage
Optical Disc Storage
Track status of each device (such as tape drives, disk drives, printers, plotters, and terminals).
Use preset policies to determine which process will get a device and for how long.
Allocate the devices.
Deallocate the devices at 2 levels:
At process level when I/O command has been executed & device is temporarily released
At job level when job is finished & device is permanently released.

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May 26, 2022
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