PPT-Mass Storage Structure: Disk Scheduling

CSSE 332 Operating Systems RoseHulman 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. What is Whole Disk Encr yp tion Whole Disk Encr yp tion versus File Encr yp tion Presentation by:. Andrew Baker. Dan Dunning. Sean Young. Understanding Storage. A storage device is any type of equipment used for storing information.. The earliest form of storage is paints and brushes.. 1. Readings. Chapter . 10. 2. Long-term Information Storage. Three essential requirements:. Must store large amounts of data. Information stored must survive the termination of the process using it (. Denny Cherry. mrdenny@mrdenny.com. twitter.com/. mrdenny. About Me. Author or Coauthor of 4 books. 6+ SQL Mag articles. Dozens of other articles. Microsoft MVP since Oct 2008. Microsoft Certified Master. Lecturer: Dr. Simon Tran. Course: IT 442. Physical Drives. Physical drives are the actual hardware devices that are used to store data.. Win 2012 support 2 different formats:. Standard format: has 512 bytes per physical sector. CS 3100 Mass Storage Systems. 1. Magnetic disks provide bulk of secondary storage of modern computers. Drives rotate at 60 to 200 times per second. Transfer rate. is rate at which data flow between drive and computer. HTM304. William Sullivan. Victor Cortez. Wendi Jardin. Jonathan Thompson. Storage. Purpose:. Without storage a computer can only function as a digital signal processing device (e.g. calculator, media player).. . DSN-4000 series Introduction. Technology Overview. Direct Attached Storage (DAS) – storage devices directly attached to a computer i.e. internal disk drive.. Network Attached Storage (NAS) – file server attached directly to a network, imbedded file system allows users to share pool of storage.. Josh Adams. Senior Program Manager. Microsoft EC CAT Team. CDP-B361. Session Objectives And Takeaways. Session Objectives . Understand the Spaces-based SDS value proposition and architecture. Showcase the proper design workflow. 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. ?. Holds. data, instructions, and information for future use.. A . storage medium . is the physical. material on which data is stored.. Examples. : DVD, CD, flash-drive, and floppy disk.. Storage. Capacity. Chapter 6 — Storage and Other I/O Topics — . 2. Introduction. I/O devices can be characterized by. Behaviour: input, output, storage. Partner: human or machine. Data rate: bytes/sec, transfers/sec. Storage. The zeros and ones in the input devices, output devices and process devices are in electronic form and are lost when the computer is turned off.. To preserve the zeros and ones when the computer is turned off they must be sent to storage devices. 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.