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Introdctn to Operating Systems

by: Melissa Metz

Introdctn to Operating Systems EECS 678

Marketplace > Kansas > Elect Engr & Computer Science > EECS 678 > Introdctn to Operating Systems
Melissa Metz
GPA 3.74

Prasad Kulkarni

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About this Document

Prasad Kulkarni
Class Notes
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This 2 page Class Notes was uploaded by Melissa Metz on Monday September 7, 2015. The Class Notes belongs to EECS 678 at Kansas taught by Prasad Kulkarni in Fall. Since its upload, it has received 39 views. For similar materials see /class/182479/eecs-678-kansas in Elect Engr & Computer Science at Kansas.

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Date Created: 09/07/15
a Chapter 10 Outline 5 File System Abstraction l File concept I Accessing le data I Directory structure Byteoriented l Protection of Information on disk sectors Named files protection Users protected from one might be corrupted if Robust to machine failures crashes Spunng 1 swgzoav 2 g Characteristics of a File 93 File Types l Provides a mode of permanent storage of information I Can indicate the internal structure of a le I Information in a le is related in some way 39 le extensions can be Used to indicate le type I Files can hold any kind of information I Should OS recognize speci c le structures is binaer applicanomde nes structures em 0 should at least recognize structure of an executable le I Files have several attributes 0 may require OS to handle all such structures increasing size 0 name identi er type location size protection and accounting may disallow cusmm ser39dem e i le Sirucmres in orma ion l Unix attempts no interpretation of les I File operations 0 application provides code to interpret le structures 0 basic operations create read write seek delete truncate I Magic number at start of le may recognize le StI39UCtUI39e 0 other operations copy rename list le attributes O inserted by the application creating the le I Operating system structures 0 systemwide open le table 0 processspeci c open le table span 2007 3 span 2009 A


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