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| | Boot sector - Wikipedia, the free encyclopedia |
 | | The boot sector is a region (typically the first 512 bytes) of a hard disk, floppy disk, or similar data storage device, or a partition thereof. | | | It is normally the latter to which the term refers, but computers configured to boot multiple operating systems may use the former as well. | | | Most computer security experts recommend disabling the ability to boot from floppies in the computer's BIOS, and only enabling it temporarily in the event it's needed. |
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http://en.wikipedia.org/wiki/Boot_sector
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| | Howstuffworks "How Computer Viruses Work" |
| | The boot sector is a small program that is the first part of the operating system that the computer loads. | | | Boot sector viruses can infect the boot sector of any floppy disk inserted in the machine, and on college campuses where lots of people share machines they spread like wildfire. | | | The boot sector contains a tiny program that tells the computer how to load the rest of the operating system. |
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http://computer.howstuffworks.com/virus6.htm
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| | Master boot record - Wikipedia, the free encyclopedia |
| | Because the MBR is read almost immediately when the computer is started, many computer viruses made in the era before virus scanner software became widespread operated by changing the code within the MBR. | | | In the IBM PC architecture the Master Boot Record (MBR), or partition sector, is the 512-byte boot sector, i.e. | | | In both cases the BIOS init transfers control to the first sector of the disk after reading it into memory. |
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http://en.wikipedia.org/wiki/Master_boot_record
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| | Windows 95a Boot Sector |
| | This boot program may not be the same as one on a PC originally formatted with Windows 95. | | | This boot sector is from a PC which was originally formatted with WFWG 3.11 and then upgraded to Windows 95 using an early upgrade CD. | | | The first 3 bytes of the boot sector are JMP and NOP instructions. |
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http://home.att.net/~rayknights/pc_boot/w95aboot.htm
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| | Boot Sector |
| | On computers that are running Windows 2000, the executable boot code in the boot sector finds Ntldr, loads it into memory, and transfers execution to that file. | | | Because the first part of the boot sector is an x86 jump instruction, the BPB can be extended in the future by appending new information at the end. | | | The boot sector, located at sector 1 of each volume, is a critical disk structure for starting your computer. |
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http://www.microsoft.com/resources/documentation/Windows/2000/server/reskit/en-us/prork/prcb_dis_stfl.asp?frame=true
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| | Boot Viruses |
| | Some viruses record their code to the last sectors of the hard disk, because those sectors are being used only when the hard disk is completely filled with information (which happens rarely, especially considering the sizes of modern hard disk drives). | | | This routine analyzes the Disk Partition Table, calculates the address of the active boot sector (usually this is the boot sector of the C: drive), loads it into memory and passes control to it. | | | In case of diskette or CD-ROM the control is passed to the boot sector, which analyzes the BIOS Parameter Block (BPB), calculates the OS system files' addresses, reads them into memory and executes them. |
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http://www.avp.ch/avpve/classes/boot.stm
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| | HIW: DOS Floppy Disk Boot Sector |
| | If a boot sector is found on the floppy disk, the that boot sector is read into memory at location 0000:7C00 and INT 19 jumps to memory location 0000:7C00. | | | This sector is created by a floppy disk formating program, such as the DOS FORMAT program. | | | This article is a disassembly of a floppy disk boot sector for a DOS floppy. |
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http://www.ata-atapi.com/hiwdos.htm
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| | BootPart |
| | Boot under MS-Dos (this can be a copy of MS-Dos 6.22 on your hard disk, on a MS-Dos bootable floppy, or the "MS-Dos 7.0" included in Windows 95 (you can obtain it by pressing Shift+F5 when Win95 loads). | | | After, this file is declared in C:\BOOT.INI (a text file used by the Windows NT boot menu). | | | BOOTPART creates a 512 byte file which contains an image of the boot sector that loads the boot sector of the partition. |
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http://www.winimage.com/bootpart.htm
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| | Boot Sector Viruses |
| | Since the volume boot code is always executed when the system attempts to boot from a device, a virus can be present on a floppy disk even if you don't format it with the system files on it using "FORMAT /S" or the "SYS" command. | | | Many people think that when you boot a system from a floppy or hard disk that has no system files--because it was formatted without transferring them--that the system doesn't boot. | | | There is always code in any disk (hard or floppy) that is formatted, whether or not the system files are present on the disk. |
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http://www.storagereview.com/guide2000/ref/hdd/file/structViruses.html
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| | Computer Boot Sequence |
| | The sector number must be representable by 6 binary digits staring at 1, not 0. | | | The Boot Sector Code therefore has to calculate its position.) Given the number of entries in the root directory, we can also compute where the user data area of the disk begins. | | | All that you need is a boot sector that is valid for loading Linux, take a snapshot of it using one of the many tools available and create a file called (for example) BOOTSECT.LIN. |
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http://www.mossywell.com/boot-sequence
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| | Write Your Own Operating System - Lesson 1 |
| | When the computer boots from a floppy, BIOS (Basic Input/Output System) reads the disk and loads the first sector into memory at address 0000:7C00. | | | In this lesson we’ll learn about the contents of the boot sector so that we can learn to write our own boot program. | | | The first instruction jumps over this data to the boot program code that follows starting at address 0x3E. |
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http://csce.unl.edu/~jgompert/OS/lesson1.htm
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| | DISCOVERY ZONE ASSEMBLY PROGRAMMING AND OS DESIGN - The Boot Sector |
| | The boot sector is the key to this mystery and can be quite intimidating to the novice system programmer. | | | The first step to writing an OS is to get the computer to load it. | | | We are here to teach, so we place the code in a set of functions to keep it organized and easy to read. |
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http://www.cynergysoft.com/DZ/OS/CH3/CH3_The_Boot_Sector.htm
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| | Boot sector software downloads |
| | An excellent partition and multi boot manager with a powerful and simple to use set of tools to quickly partition, image, or multi boot your computer. | | | Data Recovery util for recovering files even when FAT and/ or folder and/ or Boot Sector (floppy only) is damaged. | | | Active Boot Disk Professional combines six powerful tools that let you recover your lost data, reset Windows passwords, make computer system backups and securely erase data. |
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http://www.free-download-soft.com/Boot+sector
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| | The Old New Thing : Why does Windows setup lay down a new boot sector? |
| | There's a difference between the boot sector (first 512 bytes of the OS's partition) and the master boot record (first 512 bytes of the disk that the BIOS boots to). | | | Also a dual boot does not allow you to have both the operating environments up and running at the same time to share files etc. between the two environments. | | | Asking users o overwrite the boot sector is not worse than asking users if they need to reformat a partition. |
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http://blogs.msdn.com/oldnewthing/archive/2005/12/20/505887.aspx
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| | GRUB Boot Manager MBR/Boot Sector |
| | Partition Table in its agreed upon location (offsets 01BEh through 01FDh) which is followed by the standard Word-sized signature ID of AA55h (remember hex Words for Intel x86 CPUs are stored in memory with the Lowest-byte first and the Highest-byte last; that's why you see: "55 AA" on the disk). | | | In the source code, the source file for stage1 (GRUB's MBR or Boot Sector) is called: | | | ("Boot Drive") NOTE: For those of you with multi-OS booting systems, if your Linux installation with GRUB's remaining software (stage2, menu file, etc.) is located somewhere other than on the Primary Master drive, this value will be |
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http://www.geocities.com/thestarman3/asm/mbr/GRUB.htm
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| | Repair XP |
| | Also if you have an older version of XP and have upgraded to a new service pack you will get a message stating that a newer version of Windows was found and you will not be able to run the Upgrade. | | | The first one should be used if you can still boot to your Windows Desktop. | | | If your computer can not boot from a CD-Rom create a 6 floppy disk set that corresponds to your version of Windows XP Click here for |
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http://www.webtree.ca/windowsxp/repair_xp.htm
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| | Recovering NTFS Boot Sector on NTFS Partitions |
| | To verify that you are looking at the correct sector, Select Bytes from the View menu. | | | From the VIEW menu, select Bytes and verify that this is the NTFS bootsector. | | | Select the PhysicalDriveX where X = the ordinal of the disk. |
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http://support.microsoft.com/?kbid=153973
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| | Home > Glossary of Virus Terms |
| | Once the system is infected, the boot sector virus will attempt to infect every disk that is accessed by that computer. | | | The dropped files may infect executable programs or boot sectors. | | | Unlike other viruses, macro viruses do not infect programs or boot sectors - although a few do drop programs on the user's hard drive. |
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http://www.sd.co.za/glossary.shtml
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| | boot sector of extended partition - LinuxQuestions.org |
| | For example: dd if=/dev/hda of=filename bs=512 count=1 will put the first 512byte sector into a file named "filename". | | | Do you have any examples of finding boot code in the first sector of a partition, as opposed to the first sector of the disk? | | | In my system, the real data starts in sector 63---ie 0-62 are used for the boot sector, partition tables and ??. |
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http://www.linuxquestions.org/questions/showthread.php?p=2007722#post2007722
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| | skills.net |
| | The Graphics Portal: Developing dynamic internet and print solutions for all your business advertising needs. | | | YouthNet provides free Internet access to disadvantaged young people 16 -25 surf, email, resumes, chat & to create web sites. | | | AARNet's FTP Archive - find any Internet software you need. |
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http://www.skills.net.au/links/default.cfm
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| | Boot sector |
| | Boot sector contains information on logical disk and the program for loading operating system into memory and executing it. | | | It is located on the first sector of the logical disk. | | | No part of this Encyclopedia may be reproduced, transmitted or used in any other way in any form or by any means without the prior permission. |
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http://ve.nod32.ch/system/boot.php
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| | Boot Sector - Wilders Security Forums |
| | Yes you’re right; it is the master file tables not the master boot record that PD dfrags. | | | This seems very strange since you shouldn't move any sectors in MBR otherwise you will loose the ability to boot the system. | | | When you created the image and stored it into Acronis Secure Zone you will not see the image file itself because Acronis Secure Zone is special hidden partition that is not visible for any applications except Acronis True Image. |
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http://www.wilderssecurity.com/showthread.php?t=72819
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