As can be seen, the allocation of paging space is critical to the operation of the
computer system. Furthermore, the design of the storage subsystems generally
will have a big impact due to the concept of single level storage. These
considerations are taken into account in Chapter 6, “General AIX Storage
Management” on page 95 and Chapter 5, “Storage Subsystem Design” on
page 79, which cover design and management.
3.1.2 Device Drivers
Whenever an operating system component or an application needs to interact
with a physical device, such as a disk or tape, it does so through services
provided by another element of the operating system known as a device driver.
Device drivers provide a common mechanism for accessing the devices that they
support.
Device ...