system Reserved Partition Introduction edit "system reserved" PartitionWindows VISTA/7 for security reasons, in the case of a newly installed Windows VISTA/7 System, if you use the disc partition tool to partition the hard disk, the system defaults to a portion (100-200m) of the space, do not assign the drive letter (you see under the system such as C, D, E ... To hold the system boot file (a portion of the file that needs to be read first when the computer starts). In general, 100MB system reserved partitions are generated only when the following two scenarios occur:Create a reserved partition1)
New InstallationWindows 7;2) partition format using Windows 7 partition screendo not produce reserved partitionsIf any of the following conditions occur, 100MB of system reserved partitions will not produce: 1) upgrade to install Windows 7;2) use other tools (such as Gdisk.exe) to format the hard disk before a new installation; 3) Use Diskpart.exe to format the hard disk during a new installation, and to perform a clean installation without using this 100MB system-reserved partition. You can choose to use other partitioning tools such as Gdisk.exe to format the hard disk before performing a clean installation, or to perform a fresh installation directly, but on the partition screen, use Diskpart.exe to partition. The 100MB reserved partition for Windows 7 is the active partition of Windows 7, similar to/boot for Linux. In the Windows 7 Beta release, a small 100MB partition is separated during Windows 7 installation ( Earlier versions of Win7 were 200MB), which is the active partition of Windows 7, which initiates boot file storage for the partition. This is a bit like Linux, Linux in the installation process can be dedicated to a partition of about 100MB as its boot partition (/boot), this partition is mainly used to store Grub.exe,menu.lst, *fs_stage_1.5, INITRD, and files that are used by Linux boot boot processes such as kernel file Vmlinuz. Similarly, this reserved partition of Windows 7 is its primary partition, the system partition, and the active partition. Windows 7 starts from this partition during startup and then launches the C-drive directory. Windows 7 startup process: The bios--mbr--bootmgr--bcd--winload.exe--kernel loads after booting, the BIOS does post, then chooses to boot from the hard disk, loads the MBR of the hard drive and gives control to the MBR ( MBR is the first sector of a hard disk, it is not in any one partition); The MBR searches for a 64B size partition table, finds 4 primary partitions (possibly No 4) of active partitions and confirms that the other primary partitions are not active, and then loads the first sector (BOOTMGR) of the active partition into memory; Bootmgr Find and read the BCD, if there are multiple startup options, these boot options are reflected on the screen and the user chooses which startup item to start from. When you select Start from Windows 7, the C:\\windows\\system32\\winload.exe is loaded and the kernel loading process begins.2 Application-specific editing How to manually assign a drive letterThe 100MB system reserved partition for Windows 7 does not automatically assign a drive letter under the system, but you can manually assign it a drive letter, run a CMD.exe with administrator privileges, and then enter: Diskpartsel disk 0list Volsel Vol 1assign Letter=r the reserved partition is assigned a drive letter R through these lines of command, you can also assign a drive letter to it through the Disk Management tool. After assigning a good drive letter, open the R disk, which is empty. This is because the files under this partition are hidden, the system files, in the "Folder Options" will be the system files, the hidden files are set to show the files in this partition mainly have the boot directory, bootmgr, Bootsect.bakHow to delete a reserved partition for Windows 7A reserved partition for Windows 7 can be deleted, but you must be careful. Boot to Windows 7, run CMD.exe with administrator privileges, and then enter: Diskpartsel disk 0list Volsel Vol 0 (the number of your reserved Partition) Inactivesel Vol 1 (the number of your system disk "C-Drive") After active exits DiskPart, continue to enter the following command in CMD.exe: C:\windows\system32\bcdboot.exe c:\windows/s C: When the screen prompts you to succeed, you can safely delete this reserved partition, The next time you turn it on, your system will start directly from the C drive without the need for this reserved partition.3 role edit Users who install Windows 7 manually know that the system has a 100M system reserved partition installed, and that the ghost installation user does not have this partition. Below you share the role of the Windows 7 system reserved partition. 1. The status of the hidden partition this partition is formatted as NTFS, there is no disk volume label and no drive letter is assigned, and its disk status is described as: System, active, primary partition. Because there is no drive letter, it is not visible in the resource manager. 2. How to hide content in a partition by selecting the partition in Disk Manager, right-clicking and selecting the Change Drive letter and path pop-up Change wizard. Click the Add button to select "Assign the following drive letter" in the pop-up dialog, then click on the drop-down list below to choose F, and finally "OK" to exit. Next open "Computer" to see a new disk partition F, into the partition found there are two hidden directory boot and system Volume information, in addition to two hidden files bootmgr and Bootsect.bak. There is no doubt that Windows 7 saved the system's boot file in the hidden partition. 3. Effects on system startup after adding hidden partitions next we reboot the system to see if the above actions will affect the startup of Windows 7. The test result system starts normally, so the above modification will not affect the system boot. The operation to reassign the drive letter for the boot partition did not modify the system's boot file, nor did it modify the disk boot sector. As can be seen, Microsoft put the Windows 7 boot file in a separate hidden partition, must be out of the boot file Protection. 4. Delete hidden partition effect on system startup through Disk Manager, I try to "format", "Delete volume" are not successful, it is visible windows 7 protection of the partition is doing very well. Since the system tools are not working, try third-party tools. I tested it with Acronis Disk Director Suite 10.0, which removed the partition and the data above it, and then restarted the system. The system cannot start by displaying "bootmbr is missing" that is, the primary boot sector is missing. This shows that the hidden partition holds the system's boot file and the primary boot partition information of the disk. 5. Delete files in hidden partition on system boot effect to administrator login system, enter f partition and file delete. In the process of deletion, it was found that some of the files could not be deleted, that "file is in use" or "no delete permission" is displayed. It then tries to give administrator full control, and the result is rejected. After testing the discovery, even the system does not have full Control permissions, only the Trusterinstaller user has Full Control permissions. Restart the system and the system starts normally. Visible, we justFiles that are deleted are not related to system startup, and files that are actually associated with system startup cannot be deleted.
Win7 system reserved Partition BCDedit
