Operating Systems600.418File System (cont.) and Disk Management

Table of Contents

Operating Systems600.418File System (cont.) and Disk Management

File System (cont.) andDisk Managemengt

Final Exam Thursday, November 30, 12pm - 2pmand1pm - 3pmMaryland 214

Free Space Management

Free Space Management (cont.)

Free Space Management (cont.)

Free Space Management (cont.)

Directory Implementations

Directory Implementations

Directory Implementations

File System Consistency

File System Consistency (cont.)

Backup

Block (Buffer) Cache

Block Cache (cont.)

RAM Disk

Various memory caches to support the disk system

Other Performance Issues

Disk Structure

Disk Performance Parameters

Disk Performance Parameters

Disk Scheduling

Disk Scheduling (Cont.)

First Come First Served (FCFS)

Shortest Seek time First (SSTF)

SCAN

C-SCAN

LOOK, C-LOOK

N-step-SCAN

FSCAN

The RAID Concept

RAID Level 0

RAID Level 1 (1+0)

RAID Level 2

RAID Level 3

RAID Level 4

RAID Level 5

Homework

Homework (cont.)

Email: yairamir@cs.jhu.edu

Home Page: http://www.cs.jhu.edu/~yairamir/cs418/600-418.html

Other information:
Operating Systems (600.418), Lecture 8: File System (cont.) and Disk Management