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SSTF Recommendations PowerPoint PPT Presentation

SSTF Recommendations - SSTF Recommendations Technology Dolores Davison, Foothill College Manuel Baca, Student Success Task Force Kale Braden, Cosumnes River College

SSTF Recommendations Technology Dolores Davison, Foothill College Manuel Baca, Student Success Task Force Kale Braden, Cosumnes River College

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SSTF Implementation Hot Topics PowerPoint PPT Presentation

SSTF Implementation Hot Topics - SSTF ImplementationHot Topics . Julie Bruno, Sierra College, Host. David Morse, Long Beach City College. Michelle Pilati, Rio Hondo College

SSTF ImplementationHot Topics . Julie Bruno, Sierra College, Host. David Morse, Long Beach City College. Michelle Pilati, Rio Hondo College

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Operating System PowerPoint PPT Presentation

Operating System - ... (SSTF Scheduling) SSTF ...

... (SSTF Scheduling) SSTF ...

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Device Management PowerPoint PPT Presentation

Device Management - ... sstf 0 12 36 50 62 66 97 124 128 180 199 ...

... sstf 0 12 36 50 62 66 97 124 128 180 199 ...

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Moving-head Disk Machanism PowerPoint PPT Presentation

Moving-head Disk Machanism - Moving-head Disk Machanism FCFS SSTF Selects the request with the minimum seek time from the current head position. SSTF scheduling is a form of SJF scheduling; ...

Moving-head Disk Machanism FCFS SSTF Selects the request with the minimum seek time from the current head position. SSTF scheduling is a form of SJF scheduling; ...

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Disk Scheduling PowerPoint PPT Presentation

Disk Scheduling - SSTF scheduling is a form of SJF scheduling; may cause starvation of some requests. Illustration shows total head movement of 236 cylinders.

SSTF scheduling is a form of SJF scheduling; may cause starvation of some requests. Illustration shows total head movement of 236 cylinders.

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I/O Management and Disk Scheduling (Chapter 11) PowerPoint PPT Presentation

I/O Management and Disk Scheduling (Chapter 11) - Problems of arm stickiness in SSTF, SCAN, C-SCAN ... FSCAN N-step-SCAN with N = queue size at beginning of SCAN cycle (Load sensitive) ...

Problems of arm stickiness in SSTF, SCAN, C-SCAN ... FSCAN N-step-SCAN with N = queue size at beginning of SCAN cycle (Load sensitive) ...

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CS 2200 - Reverse and continue scanning. Lower variance than SSTF, similar mean waiting time ... Same as SCAN but reverse direction if no more requests in the scan direction ...

Reverse and continue scanning. Lower variance than SSTF, similar mean waiting time ... Same as SCAN but reverse direction if no more requests in the scan direction ...

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1p.01 - Title: 06 Author: jeff Last modified by: Joseph Created Date: 5/12/2004 2:54:48 PM Document presentation format:

Title: 06 Author: jeff Last modified by: Joseph Created Date: 5/12/2004 2:54:48 PM Document presentation format:

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I/O???? - Title: 4 Author: Freedom Last modified by: freedom Created Date: 6/10/2004 2:43:06 AM Document presentation format:

Title: 4 Author: Freedom Last modified by: freedom Created Date: 6/10/2004 2:43:06 AM Document presentation format:

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Disk Scheduling - Disk Scheduling The operating system is responsible for using hardware efficiently for the disk drives, this means having a fast access time and disk bandwidth.

Disk Scheduling The operating system is responsible for using hardware efficiently for the disk drives, this means having a fast access time and disk bandwidth.

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Disk Structure PowerPoint PPT Presentation

Disk Structure - Disk Structure Disk drives are addressed as large one-dimensional arrays of logical blocks, where the logical block is the smallest unit of transfer.

Disk Structure Disk drives are addressed as large one-dimensional arrays of logical blocks, where the logical block is the smallest unit of transfer.

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Emery Berger PowerPoint PPT Presentation

Emery Berger - Operating Systems CMPSCI 377 Lecture 18: Storage Systems Emery Berger University of Massachusetts, Amherst Last Time: Improving I/O Performance Approaches: Caching ...

Operating Systems CMPSCI 377 Lecture 18: Storage Systems Emery Berger University of Massachusetts, Amherst Last Time: Improving I/O Performance Approaches: Caching ...

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Disk Structure - 1) defective sectors - nearby spare sectors are substituted for the ... Access time has two ... with the minimum seek time from the current head position. ...

1) defective sectors - nearby spare sectors are substituted for the ... Access time has two ... with the minimum seek time from the current head position. ...

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Disk Scheduling

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I/O Management and Disk Scheduling - Lecture #10 I/O Management and Disk Scheduling

Lecture #10 I/O Management and Disk Scheduling

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Memoria%20secondaria PowerPoint PPT Presentation

Memoria%20secondaria - Title: No Slide Title Author: Marilyn Turnamian Last modified by: Enzo Bartolozzi Created Date: 8/24/1999 2:24:00 PM Document presentation format

Title: No Slide Title Author: Marilyn Turnamian Last modified by: Enzo Bartolozzi Created Date: 8/24/1999 2:24:00 PM Document presentation format

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Chapter 12: Mass-Storage Systems - Chapter 12: Mass-Storage Systems

Chapter 12: Mass-Storage Systems

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Memorie di massa PowerPoint PPT Presentation

Memorie di massa - Title: ARCHIVI E BASI DI DATI Author: Paolo Ciaccia Last modified by: wpenzo Created Date: 2/13/2001 5:07:26 PM Document presentation format: Presentazione su schermo

Title: ARCHIVI E BASI DI DATI Author: Paolo Ciaccia Last modified by: wpenzo Created Date: 2/13/2001 5:07:26 PM Document presentation format: Presentazione su schermo

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Standards Strategy Task Force Update TC 67 and ECS Discussion Dallas, Texas PowerPoint PPT Presentation

Standards Strategy Task Force Update TC 67 and ECS Discussion Dallas, Texas - D. Nair, S. Bergholdt, C. Stark, G. Devlin, J. Smith, API Staff. 12/19/09. 2. Background Summary. API Upstream Committee, General Committee on Refining and ...

D. Nair, S. Bergholdt, C. Stark, G. Devlin, J. Smith, API Staff. 12/19/09. 2. Background Summary. API Upstream Committee, General Committee on Refining and ...

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Textbook Ch14'12 PowerPoint PPT Presentation

Textbook Ch14'12 - Elevator Algorithm (SCAN) Illustration shows total head movement of 208 cylinders. ... SCAN/CSCAN perform better for the system but causes a heavy disk movement. ...

Elevator Algorithm (SCAN) Illustration shows total head movement of 208 cylinders. ... SCAN/CSCAN perform better for the system but causes a heavy disk movement. ...

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Mass-Storage Systems PowerPoint PPT Presentation

Mass-Storage Systems - Anyone of several disk-scheduling algorithms can be used, and we discuss them next. ... The queue of pending requests, in FIFO order, is: ...

Anyone of several disk-scheduling algorithms can be used, and we discuss them next. ... The queue of pending requests, in FIFO order, is: ...

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Operating Systems PowerPoint PPT Presentation

Operating Systems - assume 50 tracks on disc (0..49) assume 1ms to move R/W head 1 track ... dis: may miss a 'close' track if moving in other direction. CSC 350 - Dr. Gary Locklair ...

assume 50 tracks on disc (0..49) assume 1ms to move R/W head 1 track ... dis: may miss a 'close' track if moving in other direction. CSC 350 - Dr. Gary Locklair ...

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IOclassroomslides PowerPoint PPT Presentation

IOclassroomslides - Move N bytes from disk location X. to memory location M ... Seagate Barracuda-8. 7200 RPM. Seek: 8 ms. Rot lat: 4 ms. Platter size 133 GB. Tot cap 400 GB ...

Move N bytes from disk location X. to memory location M ... Seagate Barracuda-8. 7200 RPM. Seek: 8 ms. Rot lat: 4 ms. Platter size 133 GB. Tot cap 400 GB ...

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Module 10 - Module 10 Structure de m moire de masse (disque) Chapitre 12 Disques magn tiques Plats rigides couverts de mat riaux d enregistrement magn tique surface du ...

Module 10 Structure de m moire de masse (disque) Chapitre 12 Disques magn tiques Plats rigides couverts de mat riaux d enregistrement magn tique surface du ...

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I/O Management and Disk Scheduling - I/O Management and Disk Scheduling G.Anuradha Ref: Stallings

I/O Management and Disk Scheduling G.Anuradha Ref: Stallings

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8: Secondary-Storage PowerPoint PPT Presentation

8: Secondary-Storage - Title: No Slide Title Author: Marilyn Turnamian Last modified by * Created Date: 8/24/1999 2:24:00 PM Document presentation format: On-screen Show (4:3)

Title: No Slide Title Author: Marilyn Turnamian Last modified by * Created Date: 8/24/1999 2:24:00 PM Document presentation format: On-screen Show (4:3)

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Practice 8 - Is disk scheduling, other than FCFS scheduling, ... Could a RAID level 1 organization achieve better performance for read requests than a RAID level 0 organization ...

Is disk scheduling, other than FCFS scheduling, ... Could a RAID level 1 organization achieve better performance for read requests than a RAID level 0 organization ...

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Disk Structure - The one-dimensional array of logical blocks is mapped into the sectors of the disk sequentially. ... data after any failure during data transfer or recovery. ...

The one-dimensional array of logical blocks is mapped into the sectors of the disk sequentially. ... data after any failure during data transfer or recovery. ...

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Module 5.0: I/O and Disks PowerPoint PPT Presentation

Module 5.0: I/O and Disks - Module 5.0: I/O and Disks I/O hardware Polling and Interrupt-driven I/O DMA Bock and character devices Blocking and nonblocking I/O Secondary storage

Module 5.0: I/O and Disks I/O hardware Polling and Interrupt-driven I/O DMA Bock and character devices Blocking and nonblocking I/O Secondary storage

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Chapter 13 14: I/O Systems and Mass-Storage Structure PowerPoint PPT Presentation

Chapter 13 14: I/O Systems and Mass-Storage Structure - Silberschatz, Galvin and Gagne. 2002 13.1 ... of I/O devices. Common concepts. Port. Bus (daisy chain or shared direct access) Controller (host adapter) ...

Silberschatz, Galvin and Gagne. 2002 13.1 ... of I/O devices. Common concepts. Port. Bus (daisy chain or shared direct access) Controller (host adapter) ...

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File Systems PowerPoint PPT Presentation

File Systems - Two ways of handling long file names in directory (a) In-line (b) In a heap. 24. Shared Files (1) ... Dark line (left hand scale) gives data rate of a disk ...

Two ways of handling long file names in directory (a) In-line (b) In a heap. 24. Shared Files (1) ... Dark line (left hand scale) gives data rate of a disk ...

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Overview of Mass Storage Structure PowerPoint PPT Presentation

Overview of Mass Storage Structure - Overview of Mass Storage Structure Magnetic disks provide bulk of secondary storage of modern computers Disks can be removable Drive attached to computer via I/O bus

Overview of Mass Storage Structure Magnetic disks provide bulk of secondary storage of modern computers Disks can be removable Drive attached to computer via I/O bus

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What we will cover PowerPoint PPT Presentation

What we will cover - What we will cover Memory and Disk Storage Management 1-*

What we will cover Memory and Disk Storage Management 1-*

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I/O Systems - I/O Systems Chapter 15 Key concepts in chapter 15 Device drivers character and block interfaces Double buffering Disk head scheduling batching and aging as solutions ...

I/O Systems Chapter 15 Key concepts in chapter 15 Device drivers character and block interfaces Double buffering Disk head scheduling batching and aging as solutions ...

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Module 10 - Fonctionnement et structure des unit s disque. Calcul du temps d'ex cution d'une s quence ... La t te balaye le disque dans une direction, puis dans la direction oppos e, etc. ...

Fonctionnement et structure des unit s disque. Calcul du temps d'ex cution d'une s quence ... La t te balaye le disque dans une direction, puis dans la direction oppos e, etc. ...

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I/O Management and Disk Scheduling - I/O Management and Disk Scheduling Chapter 8 Advanced Operating System

I/O Management and Disk Scheduling Chapter 8 Advanced Operating System

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Operating System - Operating System Unit-4

Operating System Unit-4

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COSC 243 - NETW 3005 Mass Storage (How discs work)

NETW 3005 Mass Storage (How discs work)

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Chapter 12: Mass-Storage Systems - ... cable, SCSI initiator requests operation and SCSI targets perform ... serial architecture ... uses IP network to carry the SCSI protocol. 12.10 ...

... cable, SCSI initiator requests operation and SCSI targets perform ... serial architecture ... uses IP network to carry the SCSI protocol. 12.10 ...

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2P13 - 2P13 Week 10

2P13 Week 10

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PENGURUSAN PERANTI PowerPoint PPT Presentation

PENGURUSAN PERANTI - Title: BAB 3 Author: FSKTM Last modified by: Nornazlita Created Date: 6/5/2000 9:38:00 AM Document presentation format: On-screen Show Company: UM Other titles

Title: BAB 3 Author: FSKTM Last modified by: Nornazlita Created Date: 6/5/2000 9:38:00 AM Document presentation format: On-screen Show Company: UM Other titles

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Sistemas de Almacenamiento Masivo PowerPoint PPT Presentation

Sistemas de Almacenamiento Masivo - Los datos en discos de lectura-escritura pueden ser modificados una y otra vez. Discos WORM ( Write Once, Read Many Times ) pueden ser escritos solamente una vez.

Los datos en discos de lectura-escritura pueden ser modificados una y otra vez. Discos WORM ( Write Once, Read Many Times ) pueden ser escritos solamente una vez.

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Disk Scheduling - There is a time associated with turning heads on and off so that a different ... Remember, however, that computing the optimal schedule takes time! ...

There is a time associated with turning heads on and off so that a different ... Remember, however, that computing the optimal schedule takes time! ...

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Disks and RAID PowerPoint PPT Presentation

Disks and RAID - Disks and RAID 50 Years Old! 13th September 1956 The IBM RAMAC 350 80000 times more data on the 8GB 1-inch drive in his right hand than on the 24-inch RAMAC one in ...

Disks and RAID 50 Years Old! 13th September 1956 The IBM RAMAC 350 80000 times more data on the 8GB 1-inch drive in his right hand than on the 24-inch RAMAC one in ...

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File-System Interface PowerPoint PPT Presentation

File-System Interface - Title: Figure 11.01 Author: Marilyn Turnamian Last modified by: Faizan Rehman Created Date: 8/24/1999 1:56:22 PM Document presentation format: On-screen Show (4:3)

Title: Figure 11.01 Author: Marilyn Turnamian Last modified by: Faizan Rehman Created Date: 8/24/1999 1:56:22 PM Document presentation format: On-screen Show (4:3)

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Chapitre 14 (Seul. 14.1, 14.2, 14.4, 14.5) PowerPoint PPT Presentation

Chapitre 14 (Seul. 14.1, 14.2, 14.4, 14.5) - Title: Structure de la m moire auxiliaire Author: Luigi Logrippo Last modified by: Logrippo, Luigi Created Date: 4/2/2001 1:02:09 PM Document presentation format

Title: Structure de la m moire auxiliaire Author: Luigi Logrippo Last modified by: Logrippo, Luigi Created Date: 4/2/2001 1:02:09 PM Document presentation format

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Slide sem t - Componentes Perif rico: dispositivo conectado a um computador de forma a permitir a comunica o com o mundo externo Interface: componente que conecta o perif rico ...

Componentes Perif rico: dispositivo conectado a um computador de forma a permitir a comunica o com o mundo externo Interface: componente que conecta o perif rico ...

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Chapter 12 Mass Storage PowerPoint PPT Presentation

Chapter 12 Mass Storage - Bilkent University Department of Computer Engineering CS342 Operating Systems Chapter 12 Mass Storage Dr. Selim Aksoy http://www.cs.bilkent.edu.tr/~saksoy

Bilkent University Department of Computer Engineering CS342 Operating Systems Chapter 12 Mass Storage Dr. Selim Aksoy http://www.cs.bilkent.edu.tr/~saksoy

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????????????(I/O)??,?????????????????I/O???????,????????????????????: PowerPoint PPT Presentation

????????????(I/O)??,?????????????????I/O???????,????????????????????: - Title: Author: your name Last modified by: ZengXiaodong Created Date: 11/5/2003 6:39:17 AM Document presentation format

Title: Author: your name Last modified by: ZengXiaodong Created Date: 11/5/2003 6:39:17 AM Document presentation format

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Disc Scheduling PowerPoint PPT Presentation

Disc Scheduling - Western Digital Caviar AC2850. Western Digital Caviar ... Western Digital Caviar 1200BB. IBM Deskstar 120GP. Characteristic. Introduction to Disc Management ...

Western Digital Caviar AC2850. Western Digital Caviar ... Western Digital Caviar 1200BB. IBM Deskstar 120GP. Characteristic. Introduction to Disc Management ...

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Disk Scheduling - Calculation of total seek distance: 30 33 12 2 9 18 6 12 2 = 124. 30 ... Calculation of total seek distance: 2 1 7 3 2 6 1 1 13 ...

Calculation of total seek distance: 30 33 12 2 9 18 6 12 2 = 124. 30 ... Calculation of total seek distance: 2 1 7 3 2 6 1 1 13 ...

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Disks Mar. 24, 2004 PowerPoint PPT Presentation

Disks Mar. 24, 2004 - Three regular meeting times per week. Two hours or more at each meeting ... 50 -kilobyte transfers per second = 25 Kbyte/sec. Oh man, disks are slow. But wait! ...

Three regular meeting times per week. Two hours or more at each meeting ... 50 -kilobyte transfers per second = 25 Kbyte/sec. Oh man, disks are slow. But wait! ...

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Chapter 14: Mass-Storage Systems PowerPoint PPT Presentation

Chapter 14: Mass-Storage Systems - ... like fixed disks a new cartridge is formatted and an empty file ... An optical cartridge is likely to be more reliable than a magnetic disk or tape. ...

... like fixed disks a new cartridge is formatted and an empty file ... An optical cartridge is likely to be more reliable than a magnetic disk or tape. ...

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Introduction to Operating Systems PowerPoint PPT Presentation

Introduction to Operating Systems - rand() Generate a random number in range [a, b] (int)(((double)rand() / ((double)RAND_MAX (double)1)) * (double)(b - a 1)) a; ...

rand() Generate a random number in range [a, b] (int)(((double)rand() / ((double)RAND_MAX (double)1)) * (double)(b - a 1)) a; ...

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Disks - Outline Next two weeks. General discussion of disks. Architecture, ... 1.25 per GB 40 GB Barracuda. 7200 rpm, 8.5 ms. ms. avg. seek time, 2 MB drive cache ...

Outline Next two weeks. General discussion of disks. Architecture, ... 1.25 per GB 40 GB Barracuda. 7200 rpm, 8.5 ms. ms. avg. seek time, 2 MB drive cache ...

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