Chap 11 - Short Answer
The simplest form of scheduling is ___________ scheduling, which processes items from the queue in sequential order.
FIFO
The sum of the seek time and the rotational delay equals the __________ , which is the time it takes to get into position to read or write.
access time
The term _________ is usually used to apply to a memory that is smaller and faster than main memory, and that is interposed between main memory and the processor.
cache memory
When more than two buffers are used, the collection of buffers is itself referred to as a __________, with each individual buffer being one unit.
circular buffer
External devices that engage in I/O with computer systems are grouped into three categories: human readable, machine readable, and __________ .
communication
A __________ module controls the exchange of data between main memory and an I/O module.
direct memory acces
At the _________ layer, symbolic file names are converted to identifiers that either reference the file directly or indirectly through a file descriptor or index table.
directory management
Two objectives are paramount in designing the I/O facility: generality and __________ .
efficiency
The _________ layer deals with the logical structure of files and with the operations that can be specified by users, such as open, close, read, and write.
file system
Windows supports two sorts of RAID configurations: Software RAID and __________ .
hardware RAID
The __________ module deals with the device as a logical resource and is not concerned with the details of actually controlling the device.
logical I/O
Disk drives, USB keys, sensors, and controllers are examples of __________ external I/O devices.
machine readable
The __________ policy is to select the disk I/O request that requires the least movement of the disk arm from its current position.
shortest service time first
A __________ transfers data in and out as a stream of bytes, with no block structure.
stream-oriented device
A set of logically consecutive strips that maps exactly one strip to each array member is referred to as a __________ .
stripe
