Exam 20: Disk Management and I/O Subsystem

In the___________algorithm, the disk head moves from one end to the other, servicing requests along the way. When the head reaches the other end, it immediately returns to the beginning of the disk without servicing any requests on the return trip.

A disk that has a boot partition is called a

In the___________  algorithm, the disk arm starts at one end of the disk and moves toward the other end, servicing requests till the other end of the disk. At the other end, the direction is reversed and servicing continues.

The___________  register is read by the host to get input.

For large data transfers,___________    is used.

The___________program initializes all aspects of the system, from CPU registers to device controllers and the contents of main memory, and then starts the operating system.

In general the two interrupt request lines are___________

Division by zero, accessing a protected or non existent memory address, or attempting to execute a privileged instruction from user mode are all categorized as___________  

The hardware mechanism that allows a device to notify the CPU is called___________

The___________    are reserved for events such as unrecoverable memory errors.

The header and trailer of a sector contain information used by the disk controller such as___________    and___________    

The scheme used in the above question is known as___________or___________  

If one or more devices use a common set of wires to communicate with the computer system, the connection is called___________  

The process of dividing a disk into sectors that the disk controller can read and write, before a disk can store data is known as

When device A has a cable that plugs into device B, and device B has a cable that plugs into device C and device C plugs into a port on the computer, this arrangement is called a

For most computers, the bootstrap is stored in___________  

SSTF algorithm, like SJF___________      of some requests.

The___________  register is written by the host to send output.

The___________    determines the cause of the interrupt, performs the necessary processing and executes a return from the interrupt instruction to return the CPU to the execution state prior to the interrupt.

The___________    present a uniform device- access interface to the I/O subsystem, much as system calls provide a standard interface between the application and the operating system.