COMPUTER STORAGE The device, which is used to store data, is called computer storage. We can divide computer storage into following categories. Computer Storage Permanent Secondary Temporary ROM Optical Disk Magnetic Disk Magnetic Tape RAM Cache C.D DVD H.D F.D ZIP Secondary Storage It is not possible to store large amount of data for future use in primary memory of computer because its size is small and it cannot store data on permanent basis. So it is necessary to use
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things simple and less room for error. Interesting fact about formatting, in the world of Information Technology, the term “formatting” can have several different meanings. • Disk formatting “the process of preparing a data storage device such as a hard disk drive, solid-state drive, floppy disk or USB flash drive” (Disk formatting, 2013) • File formatting “tells the computer how to display, print, and process, and save the data” (File format, 2013). • Page formatting “describe the page layout
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Raymond D. Jambalos BSIT Physical Security measures every organization should take Lock up the server room Even before you lock down the servers, in fact, before you even turn them on for the first time, you should ensure that there are good locks on the server room door. Of course, the best lock in the world does no good if it isn’t used, so you also need policies requiring that those doors be locked any time the room is unoccupied, and the policies should set out who has the key or keycode
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------------------------------------------------- 1. ------------------------------------------------- Start your pc and press key F2, F12 or delete key (Depends on your PC model). Your PC Bios settings will be displayed. Find boot menu. In boot device priority select CD-ROM as first boot device. 1. ------------------------------------------------- ------------------------------------------------- 3 ------------------------------------------------- Insert your Windows XP cd and
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slightly less expensive with its 4TB version at $219 list. Device Type: Fixed Home NAS | Operating System: Embedded Linux | Maximum Storage Capacity: 4 TB | Rack-mount or Standalone: Standalone | Hard Disk Configuration: Fixed Single | Network Medium: Wired | External USB Hard Disk Expansion: Yes | Connection Type: USB 3.0, Ethernet | UPnP Capable: Yes | Printer Server: No | Media Server: Yes | Remote Access: Yes | Wired Network Speed: 10/100/1000 | * Pros Incredible Read/Write
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Chapter 1 Introduction to Linux At a Glance Class Notes Table of Contents • Overview • Objectives • Teaching Tips • Quick Quizzes • Class Discussion Topics • Additional Projects • Additional Resources • Key Terms • Technical Notes for Hands-On Projects Lecture Notes Overview Linux technical expertise is essential in today’s computer workplace as more and more companies switch to Linux to meet their computing needs. Thus, it is
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mother: -Video slots -AMR Audio/Modem riser card –Sound cards -network cards –TV tuner cards -modems -host adapters (eg. SCSI and RAID controllers -POST cards -BIOS expansion ROM cards -disk controller cards –Interface adapters –RAM disks –solid-state drives –security device cards –radio tuner cards –hard disk cards 2. - IRQ 0 - system timer IRQ 1 - keyboard controller IRQ 2 - cascaded signals from IRQ's 8-15 (any devices configured to use IRQ 2 will actually be using IRQ 9) IRQ 3 - serial port
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would only detect if a bit was bad or good without a way to fix it. ECC is used in modern memory to correct memory errors at the bit level and correct any problems it may find. There are magnetic, optical, and solid state storage devices. Floppy disks and hard drives are magnetic storage devices. If exposed to a magnet data loss may result. Hard drives have a 137 GB limit. You must flash the BIOS to upgrade it and it will allow it to support a larger number of hard drive addresses. The Hard drive
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machine with two principal characteristics: •It responds to a specific set of instructions in a well-defined manner. •It can execute a pre-recorded list of instructions (a program). Hardware refers to objects that you can actually touch, like disks, disk drives, display screens, keyboards, printers, boards, and chips. Software exists as ideas, concepts, and symbols, but it has no substance. (Books provide a useful analogy. The pages and the ink are the hardware, while the words, sentences, paragraphs
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responsible for handling the I/O functions. The SATA host adapter will let you connect an external hard drive for backup. One component that you may not see any more is the floppy drive controller. It is used to reading and writing to a computer’s floppy disk drive. By upgrading the motherboard alone will give some performance improvement to a computer system. Your I/O systems may not improve. It will depend on the adapters cards they are attached to. There is a need for multiple buses found on a motherboard
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