[permalink] [id link]
The first stage of boot loaders located on fixed disks and removable drives must fit into the first 446 bytes of the Master Boot Record in order to leave room for the default 64-byte partition table with four partition entries and the two-byte boot signature, which the BIOS requires for a proper boot loader — or even less, when additional features like more than four partition entries ( up to 16 with 16 bytes each ), a disk signature ( 6 bytes ), a disk timestamp ( 6 bytes ), an Advanced Active Partition ( 18 bytes ) or special multi-boot loaders If an active partition is found, the MBR code loads the boot sector code from that partition, known as Volume Boot Record ( VBR ), and executes it.
from
Wikipedia
Some Related Sentences
first and stage
The life history of the alkali bee is similar to that of Andrena, but the first activity of the adults does not take place until summer, and the individuals hibernate in the prepupal stage.
The first stage of translation after glossary lookup is structural analysis of the input text.
Although it is not possible to sunder old and new in this era, I shall consider in the present chapter primarily the first decades of the eighth century and shall interpret them as an apogee of the first stage of Greek civilization.
The first stage of operation has centered on the literature imaging of critical or summarizing tabulations such as the Barker Index.
The luminous gain of a single stage with Af ( flux gain ) is, to a first approximation, given by the product of the photocathode sensitivity S ( amp / lumen ), the anode potential V ( volts ), and the phosphor conversion efficiency P ( lumen/watt ).
It is obvious that the careful choice of photocathode which maximizes Af for a given input E ( in the case of the second stage, for the first phosphor screen emission ) is very important.
He recognized that whatever transformation may be effected in the first stage of an R-stage process, the remaining stages must use an optimal Af-stage policy with respect to the state resulting from the first stage, if there is to be any chance of optimizing the complete process.
Moreover, by systematically varying the operating conditions in the first stage and always using the optimal Af-stage policy for the remaining stages, we shall eventually find the optimal policy for all R stages.
For any choice of admissible policy Af in the first stage, the state of the stream leaving this stage is given by Af.
If we consider a process in which the outcome of one stage is known before passage to the next, then the principle of optimality shows that the policy in subsequent stages should be optimal with respect to the outcome of the first.
Thus, typically, the first stage of a Communist takeover is to `` neutralize '' a country.
During the first stage of the plague outbreak, Paneloux preaches a sermon at the cathedral.
Assuming no loss of time when moving a car from one station to another, the longest stage on the assembly line determines the throughput ( 20 minutes for the engine installation ) so a car can be produced every 20 minutes, once the first car taking 35 minutes has been produced.
* 1871 – The first stage of the Brill Tramway opened.
The excavators discovered the final stage of the Temple of Aphrodite, also known as Aphrodisias, which dates approximately to the first century BC.
* 1944 – The 1st Air Commando Group using Sikorsky R-4 helicopters stage the first use of helicopters in combat with CSAR operations in the China-Burma-India theater.
NASA later confirmed the object to be a piece of the first stage of the Saturn V rocket that launched Apollo 16 into space.
Ayckbourn joined Wolfit on tour to the Edinburgh Festival Fringe as an acting assistant stage manager ( meaning a role that involved both acting and stage management ) for three weeks, with his first role on the professional stage being various parts in The Strong are Lonely by Fritz Hochwälder .< ref name = acting >
first and boot
The first thing every morning when she washed her face she could see the scar on her chin where he'd cut her with a boot cleat, and maybe she saw him heaving it again, the dirty sock popping out as it flew.
The BIOS software is built into the PC, and is the first code run by a PC when powered on (' boot firmware ').
The term BIOS ( Basic Input / Output System ) was invented by Gary Kildall and first appeared in the CP / M operating system in 1975, describing the machine-specific part of CP / M loaded during boot time that interfaces directly with the hardware ( a CP / M machine usually has only a simple boot loader in its ROM ).
Other uses of Forth include the Open Firmware boot ROMs used by Apple, IBM, Sun, and OLPC XO-1 ; and the FICL-based first stage boot controller of the FreeBSD operating system.
The first ( boot ) hard disk drive was given the name C :; further drives, if present, were given the letters following.
* 1982 – Richard Skrenta writes the first PC virus code, which is 400 lines long and disguised as an Apple boot program called " Elk Cloner ".
* Master boot record, the first sector of a partitioned data storage device, used for booting
The Windows 2000 boot screen in the final version first appeared in Beta 3 build 1994.
The 13-year old took a series of odd jobs to support himself, working first as a boot black, a porter, a general laborer, and a construction worker who assisted with the erection of the Brooklyn Bridge.
It has an additional role as the first program run after boot, hence being responsible for setting up the system by running the AUTOEXEC. BAT configuration file, and being the ancestor of all processes.
Seeing the blood dripping on Wales's boot, Fletcher says that he will give Wales the first move, because he " owes him that.
The final version boot screen was first featured in Beta 3 build 2513.
* 1962: Lange produces the first plastic ski boot.
* Appearance of Lehigh virus, boot sector viruses such as Yale from USA, Stoned from New Zealand, Ping Pong from Italy, and appearance of first self-encrypting file virus, Cascade.
In order for recruits to pass boot camp, they will be physically and mentally tested on a 12 hour exercise called Battle Stations which consists of 12 different scenarios consisting of firefighting, first aid knowledge, survival at sea, mass casualties, shipboard flood control, bomb detection and many other skills that they have been learning in the past 7 weeks.
first and loaders
Oxen were at first used with the high-wheel loaders, but in the 1930s tractors replaced the oxen.
The history of software tools began with the first computers in the early 1950s that used linkers, loaders, and control programs.
Large loaders, such as the Kawasaki 95ZV-2, John Deere 844K, Caterpillar 950H, Volvo L120E, Case 921E, or Hitachi ZW310 usually have only a front bucket and are called Front Loaders, whereas small loader tractors are often also equipped with a small backhoe and are called backhoe loaders or loader backhoes or JCBs, after the company that first invented them.
In 1970, Hy-Dynamic now a division of Bucyrus-Erie, manufacturer of the Dynahoe was the first company to incorporate a four wheel drive system into their backhoe loaders, allowing these models to go over almost any terrain with little difficulty.
Aircraft loaders had earlier refused to work at the extreme 30 foot height necessary for putting freight on the upper deck, so the " supernumerary area " or " hump " was configured with 19 first class seats instead which were used to transport livestock handlers, charter agents and mechanics as well as dead-heading pilots and flight attendants.
The Kammerlader, or " chamber loader ", was the first Norwegian breech loading rifle, and among the very first breech loaders adopted for use by an armed force anywhere in the world.
While the first flintlock breech loading rifles, such as the Ferguson, were launched decades before 1842 Norway was the first European country to introduce breech loaders on a large scale throughout its army and navy, although the United States had been the first in the world with the M1819 Hall rifle.
For this reason, first stage boot loaders tend to be written in assembler language and only do the minimum to provide a normal execution environment for the next program.
0.156 seconds.