PPT-DOS FAT CS 140 Lecture Notes: Disk Scheduling

Author : riley | Published Date : 2023-11-12

Slide 1 free File Allocation Table A 6 B 1 6 4 3 0 1 File A File B Directory 5 2 end 2 3 end 3 4 5 end 4 6 7 free 1 2 Disk Scheduling CS 140 Lecture Notes Disk

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DOS FAT CS 140 Lecture Notes: Disk Scheduling: Transcript

Slide 1 free File Allocation Table A 6 B 1 6 4 3 0 1 File A File B Directory 5 2 end 2 3 end 3 4 5 end 4 6 7 free 1 2 Disk Scheduling CS 140 Lecture Notes Disk Scheduling. Moving-head Disk Mechanism. Magnetic Disk Performance. Average access time . = average seek time + average latency+ transfer time . For example, to transfer a . k bytes block . on a . 3600 RPM . disk with a . Slide . 1. Sample bold display. P. B. #text. #text. nextSibling. prevSibling. nextSibling. prevSibling. firstChild. lastChild. parentNode. parentNode. parentNode. Slide . 1. <. p>Sample . bold display. P. B. #text. #text. nextSibling. prevSibling. nextSibling. prevSibling. firstChild. lastChild. parentNode. parentNode. parentNode. Slide . 1. <. p>Sample . bold display. P. B. #text. #text. nextSibling. prevSibling. nextSibling. prevSibling. firstChild. lastChild. parentNode. parentNode. parentNode. Slide . 1. Access Matrix. File A. File B. File C. Printer 1. Alice. RW. RW. RW. OK. Bob. R. R. RW. OK. Carol. RW. David. RW. OK. Faculty. RW. RW. OK. CS 140 Lecture Notes: Protection. Slide . 2. Access Matrix. CSSE 332. Operating Systems. Rose-Hulman Institute of Technology. Disk blocks on disk surface. Disk performance parameters. To read or write, the disk head must be positioned at the desired track and at the beginning of the desired sector. Slide . 1. CSS Rule. body {. font-family: Tahoma, Arial, sans-serif;. color: black;. background: white;. margin: 8px;. }. Selector. Declaration. Block. Attribute Name. Value. CS 142 Lecture Notes: CSS. CSSE 332. Operating Systems. Rose-Hulman Institute of Technology. Disk blocks on disk surface. Disk performance parameters. To read or write, the disk head must be positioned at the desired track and at the beginning of the desired sector. BYU CS 345. Disc Scheduling. 2. CS 345. Stalling’s Chapter. #. Project. 1: Computer System Overview. 2: Operating System Overview. 4. P1:. Shell. 3: Process Description and Control. 4: Threads. 4. Slide . 1. Sample bold display. P. B. #text. #text. nextSibling. prevSibling. nextSibling. prevSibling. firstChild. lastChild. parentNode. parentNode. parentNode. Slide . 1. CSS Rule. body {. font-family: Tahoma, Arial, sans-serif;. color: black;. background: white;. margin: 8px;. }. Selector. Declaration. Block. Attribute Name. Value. CS 142 Lecture Notes: CSS. Slide . 1. Google Datacenter. CS 142 Lecture Notes: Datacenters. Slide . 2. Datacenter Organization. Rack:. 50 machines. DRAM: 200-800GB @ 300 . µs. Disk: 100TB @ 10ms. Single server:. 4-8 cores. DRAM: 4-16GB @ 100ns. Slide . 1. Basic Ruby Syntax. sum = 0. i. = 1. while. . i. <= 10 . do. sum += . i. *. i. . i. = . i. + 1. end. puts "Sum of squares is #{sum}\n". Newline is statement separator. do ... end. Don Porter. Portions courtesy Emmett . Witchel. 1. Quick Recap. CPU Scheduling. Balance competing concerns with heuristics. What were some goals?. No perfect solution. Today: Block device scheduling.

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