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《操作系统概念》

作者：【美】西尔伯查茨 等  出版社：高等教育出版社

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题目 题型
None of the disk-scheduling disciplines, except FCFS, is truly fair (starvation may occur). a. Explain why this assertion is tr 问答
Suppose that a disk drive has 5000 cylinders, numbered O to 4999. The drive is currently serving a request at cylinder 143, and 问答
Compare the performance of C-SCAN and SCAN scheduling, assuming a uniform distribution of requests. Consider the average respons 问答
Requests are not usually uniformly distributed. For example, a cylinder containing the file system FAT or inodes can be expected 问答
Could a RAID Level 1 organization achieve better performance for read requests than a RAID Level O organization (with nonredunda 问答
Consider a RAID Level 5 organization comprising five disks, with the parity for sets of four blocks on four disks stored on the 问答
Compare the throughput achieved by a RAID Level 5 organization with that achieved by a RAID Level 1 organization for the followi 问答
Compare the performance of write operations achieved by a RAID Level 5 organization with that achieved by a RAID Level 1 organiz 问答
Assume that you have a mixed configuration comprising disks organized as RAID Level 1 and as RAID Level 5 disks. Assume that the 问答
Is there any way to implement truly stable storage? Explain your answer.  问答
The reliability of a hard-disk drive is typically described in terms of a quantity called mean time between failures (MTBF). Alt 问答
Discuss the relative advantages and disadvantages of sector sparing and sector slipping. . 问答
Discuss the reasons why the operating system might require accurate information on how blocks are stored on a disk. How could th 问答
The operating system generally treats removable disks as shared file systems but assigns a tape drive to only one application at 问答
What would be the effect on cost and performance if tape storage were to achieve the same areal density as disk storage? (Areal 问答
You can use simple estimates to compare the cost and performance of a terabyte storage system made entirely from disks with one 问答
Discuss how an operating system could maintain a free-space list for a tape-resident file system. Assume that the tape technolog 问答
Suppose that a one-sided 5.25-inch optical-disk cartridge has an areal density of 1 gigabit per square inch. Suppose that a magn 问答
Imagine that a holographic storage drive has been invented. Suppose that a holographic drive costs $10,000 and has an average ac 问答

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