剖析深度剖析xp的boot.ini（Depth analysis of XP boot.ini）

深度剖析xp的boot. ini Depth analysis of XP boot. iniThere are more than one operating system installed on thecomputer friends know, in computer power on self test after theemergence of a start menu, which lists the installed on thiscomputer, all of the operating system, users use the "arrow""down" button can choose to enter the system. In fact, it allcomes from a file called BOOT. INI, which has existed in theWindows system since Windows NT started. The Windows XP reliesprimarily on the BOOT. INI file to determine the selectedoperating system categories that the computer displays duringthe reboot (boot) process. In general, it is located in the rootdirectory of C, by default is a hidden read-only systemconfiguration files. To view it, as long as the hidden attributeis removed, use Notepad to open it, you can also"start" in theoperation of msconfig. exe, in the pop-up"system configurationutility dialog box, click the" BOOT. INI "tab, you can get aglimpse of the true face of Mount Lu. Here on the author' scomputer BOOT. INI file, for example, to explain in detail.The common formats for BOOT. INI files are as follows:[boot loader]

Timeout=30

Default=multi (0) disk (0) rdisk (0) partition (1) \WINDOWS[operating systems]

Multi (X) , disk (Y) , rdisk (Z) , partition (Q) , \WINDOWS=,Microsoft, Windows, XP, Professional, /fastdetect

SCSI (X) , disk (Y) , rdisk (Z) , partition (Q) , \WIN98=,Microsoft, Windows 98, /fastdetect

The file is divided into two parts, Boot, loader (boot loader)and Operating systems (operating system) . In the boot loadsection, the timeout=xx indicates the time the user is waitingto select the operating system. The default is 30 seconds, andthe user can change it as needed. The default=xxxx indicatesthe default operating system path that the system defaults toloading, showing the wait for the highlight section selectedby the user when it is started. But what puzzles many users iswhat do those "multi (0) disk (0) rdisk (0) partition (1)"mean?In fact, this is named after the ARC rule, which is a commonway of identifying devices in x86 or RISC computers. The ARCname refers to the partition that holds the operating systemfile. For the disk device, the ARC name is constructed asfollows:

(X) disk (Y) , rdisk (Z) , partition (Q)

The component section has two valid values, namely multi andSCSI, which are used to mark the hardware adapter. Multirepresents a non SCSI hard disk or a SCSI hard disk that isaccessed by SCSI BIOS, while SCSI represents a SCSI BIOSforbidden SCSI hard disk. The X value indicates the serialnumber on the same disk controller where the disk where the OS' ssystem root directory is located (X starts at 0) .

Disk (Y) for the SCSI hard disk, Y said in the same disk

controller on the hard drive serial numberwhere the systemrootof the operating system partition where the hard disk (Y startfrom 0) ; for multi, Y values have no meaning, constant is 0.Rdisk (Z) : the multi, Z said in the same number of hard diskcontroller on the system root of the operating system partitionwhere the hard disk (Z start from 0) ; for the SCSI hard disk,the Z value is meaningless, the constant of 0.

The partition (Q) :Q value indicates the partition number of theoperating system' s root directory on the same hard disk, theordinal number of the primary partition (Q starts at 1) .The Operating systems section lists the paths and lists of allthe operating systems on this computer, including some switchessuch as /fastdetect, /basevideo, and/sos. These switches havespecial meanings and are generally advised not to be changed.OK, based on the above knowledge, we should have a clearunderstanding of the BOOT. INI file. So we can modify it asneeded. With the computer as an example, BOOT. INI documentsshow that two Windows XP professional edition system with harddisk (actually a Chinese version, a English version) , thedefault is to start the systempartition on the hard disk third(English version) . If you want it to start the system on thefirst partition of the hard disk (Chinese version) by default,and to mark the difference, mark the two Windows, XP,Professional, respectively. At this point, we can modify theBOOT. INI file to achieve its purpose, as shown in figure 2.Restart your computer and see if your wish is fulfilled!

From the above we can see that BOOT. INI is a very importantsystem file, without it, the system will not be able to boot,so we usually need to make a necessary backup to it, but alsoedit it. Especially when installing multiple systems,The file is often corrupted if there is no installation orderfrom low to high (Windows 98, Windows 2000, Windows, XP, andWindows 2003) . If we master the way to edit and edit it, we won'tbe able to do anything.