Skip to main content

Definition of MBR (Master Boot Record)

Master Boot Record or MBR is the boot sector of a hard disk used as a de facto standard.The boot sector is called in Spanish as the main boot record, master boot record or boot sector, which is almost always MBR.

MBR is a special type of boot or boot sector that is physically stored at the beginning of a partitioned storage device such as a hard disk.It is used on compatible IBM PCs.

MBR sector is not located in a partition, but is physically located before the first partition, within the first sector of the storage disk.

MBR Development

The MBR concept It was released publicly in 1983 with the PC DOS 2.0 operating system, where the FDISK tool for managing partitions was introduced.The original version of the MBR was created by David Litton at IBM in June 1982.

The table of partition supports up to four primary partitions.porting extended partition, a special type of primary partition used as a container for other partitions, as of the release of DOS 3.2.

In 1996, support for logical block addressing (see: LBA) was added in Windows 95B and DOS 7.10, thus allowing to support disks larger than 8 GB.Also there are disk timestamps introduced.

It was adopted as a de facto standard in the computer industry due to the popularity of compatible IBM PCs, which It was where it began to be used, despite its poor documentation of certain features (which caused occasional compatibility problems).

Can only be used on disks up to 2 terabytes when using disks with 512 sectors Byte, for this reason for larger hard drives other partition schemes should be used.For example, the GUID Partition Table (GPT); hybrid MBRs are also used that try to solve the 2 TB limitation, keeping the partitions in the first physical 2 TB of the hard disk.This lack of a common standard causes some compatibility problems in certain scenarios.

MBR Features

The MBR has information on how the logical partitions, contained in the file systems, are organized in a storage medium.The MBR also contains executable code to function as a loader of an installed operating system , for this reason it is usually also considered a boot loader.

MBR has a size of 512 bytes (or more, depending on the size of the disk sector), located in the first sector of a storage unit and contains one or more of:

-A partition table that describes the partitions of the storage device.In this context it can also be called also partition sector.Basically describes locations, they also os and other attributes of linear regions called partitions.In turn, partitions may contain data that describes more complex partition schemes, such as EBR (extended boot records), BSD disklabels or metadata for Logical Disk Manager partitions.

-Bootstrap code: which are instructions to identify the partition that was configured as bootable, and then open and run its VBR (volume boot record).The VBR is a boot or boot sector present in an individual partition to usually start a system operational.See: bootstrap.

-Optionally a 32-bit disk timestamp.

-Optionally a 32-bit disk signature.

The organization of The partition table in the MBR limits the addressable storage space of a disk to 2 terabytes (2 ^ 32 x 512 bytes).

Any questions? needs more information?
Write and we will respond to your email

Etiquetas:

Comments

Post a Comment

Popular posts from this blog

Definition of Macrocomputer (macrocomputer)

A macrocomputer is a large, powerful and expensive computer used primarily in companies that need to process large amounts of data or support large numbers of users.It contrasts with the concept of microcomputer (or microcomputer).Sometimes called macrocomputers. In English: mainframe and macrocomputer. For more information see: Mainframe What is a macrocomputer or mainframe? A large and powerful computer capable of managing a large number of simultaneous tasks and of communicating with a large number of connected terminals; used by large and complex organizations (such as banks and supermarkets) in which continuous operation is vital. Characteristics of macromputers Macrocomputers are a type of computer that are generally known Due to their large size, storage quantity, processing power and high level of reliability, they are mainly used by large organizations for critical mission applications that require large volumes of data processing.In general, there are some characte...
3 comments
Read more

Definition of DPI or PPP (print quality)

(dots per inch, dots per inch).The DPI or PPP is a unit of measurement of the resolution of an image (related to quality) of a scanner, a printer, etc.It serves to measure the resolution, which is the amount of dots that enter an inch.It is expressed like this: (number) x (number) dpi. A resolution of 300 dpi will produce a text that will show broken lines visible under a magnifying glass.Even larger resolutions are necessary to obtain reproductions of smooth photographs.Professional graphics use printers with resolutions from 1200 to 2400 dpi. Pixels or resolution of a photo and printing in centimeters There is no direct equivalence between the pixels of a digital image and the centimeter of printing that correspond to it.A very small image can be printed very large on paper, but the pixels of the printed image will begin to be noticed at first glance.There are techniques to "enlarge" the digital image and soften it a bit the pixels, but these do not make ma ravillas. ...
Post a Comment
Read more

Monoprogramming Definition

Monoprogramming, also called monoexecution, is an operating system in which only one program is executed at a time and no other is executed until the previous one is finished. In other words, only one program is executed at a time within a single address space. This type of execution practically does not exist anymore because it has been replaced by multiprogramming. Monoprogramming vs.multiprogramming In the monoprogramming, the memory only contains one program at any time, while in the multiprogramming the memory contains more than one user program. In the case of monoprogramming, when the CPU is running the program and it find an I/O operation (input-output), then the program goes to the I/O devices, during that time the CPU remains idle.Therefore, in the monogramming the CPU is not used effectively, that is, CPU utilization is poor. However, in the multiprog branch, when a user program contains I/O operations, the CPU changes to the next user program.Therefore, the CPU i...
Post a Comment
Read more

Definition of Eset

Eset is a computer security company based in Bratislava, Slovakia. Eset was founded in 1992 as a result of the merger of two private companies.Its best-known product is the NOD32 antivirus, although it also develops Smart Security, which includes the NOD32 features in addition to firewall and antispam. Compete with other security companies such as Symantec and McAfee Questions? needs more information? Write and we will respond to your email
Post a Comment
Read more

Google bomb definition

(Google bomb) In the internet jargon, Google bomb refers to a certain type of attempt to influence the ranking of a specific page, in a search result returned by the Google search engine, often with humorous or political intentions.p> A specific page can go up in the Google ranking, if a large number of external links (with certain keywords) are created to that page.The technique also has effects on other search engines, since they use similar methods of positioning pages. Google bombing is related to spamdexing, a set of practices to improve the position of a website in the search results of Internet search engines. Google announced on 25 January 2007, which had introduced the necessary changes to minimize the impact of Google bombs. Googlebomb cases The first popular case of Google bomb, with an unknown author, was when search for phrase "more evil than Satan himself "(worse than Satan himself) on Google, threw as a first result the page of Microsoft. One of the...
Post a Comment
Read more

Definition of Pie menu

Addictions (foot menu, radial menu, cake menu, cake menu).Circular menu type.See Cake menu. Do we improve the definition? Points: 0 (0 votes) We answer your questions or comments below: Questions? needs more information? Write and we will respond to your email Informatics Dictionary
Post a Comment
Read more

Floppy disk drive definition

The floppy disk drive is a physical device or drive that is responsible for reading/writing to floppy disks.In English, floppy disk drive (FDD) or floppy disk drive. In IBM PCs, they are used to write or read on floppy disks.5 1/4 or 3 1/2 inches.They are usually represented with the A: or B units: They are removable storage devices. The floppy drives were invented by the IBM company, being the versions of 8, 5¼ and 3½ inches (and all its variants) the most popular forms for the storage and exchange of data from the mid-70s to the end of the 90s.Computers gradually stopped bringing floppy drives, being replaced by readers of optical disks (CDs, DVDs...), flash memories, external hard drives, etc. Operation of the floppy drives Basically the floppy drives have a small motor that rotates a floppy disk at a controlled speed, while a second engine operates a mechanism that moves a Magnetic read-write head on the surface thereof.Both read and write operations require the head to ph...
Post a Comment
Read more

Web Proxy Definition

A web proxy is used to intercept the navigation of web pages for reasons of security, anonymity, performance, etc. A web proxy can be accessed by an IP address, free or paid, which is added to a browser (also There are proxy programs to avoid the configuration process.) When someone uses the browser, everything that is done in it first goes through the proxy first (the proxy server).That is, if a web page is requested the remote proxy will It is in charge of looking for it and sending it to our computer.In this intermediate step the proxy can be used to: * Anonymous browsing: if the proxy is configured in this way, anyone who navigates through that proxy will do so Anonymously, the destination pages will not be able to know the IP address (identification) of the computer you are browsing; they will only see the IP address of the proxy.If a proxy is not configured to be anonymous it is said to be transparent browsing. * Safe browsing: a proxy is responsible for filtering or alertin...
Post a Comment
Read more

Definition of Cognitive Computing (CC)

Cognitive computing (CC) describes technology platforms that, in general terms, are based on the scientific disciplines of artificial intelligence and signal processing.These platforms cover machine learning, reasoning, natural language processing, voice recognition and vision (object recognition), man-machine interaction, dialogue and narrative generation, among other technologies. At present, there is no widely accepted definition of cognitive computing. In general, the term computation Cognitive has been used to refer to new hardware and/or software that mimics the functioning of the human brain and helps to improve people's decision-making.In this sense, CC is a new type of informatics with the aim of obtaining more models precise how the human brain/mind detects, reasons and responds to the stimulus. Uses of Cognitive Computing -Voice Recognition -Analis is of feelings -Face detection -Risk assessment -Fraud detection -Behavioral recommendations Characteristics of...
Post a Comment
Read more

Network transparency definition

Network transparency refers to the ability of a protocol to transmit data over the network in a way that is transparent (invisible) to those who are using the applications that use the protocol.In this regard, users of a particular application they can access remote resources in the same way they would access their own local resources. An example of this is cloud storage, where remote files are presented as if they were locally accessible; also the cloud computing where the resource in question is the processing. From English: network transparency. X Windows The term is often applied partially correctly in the context of the X Windows system, which is capable of transmitting graphic data over the network and integrating it seamlessly with the applications that are running and displayed locally; however, certain extensions of the X Windows system are not able to work on the network. Firewall In firewall technology, transparency can be defined in the network layer ( or IP) or ...
Post a Comment
Read more