![]() Use diskpart.exe to partition and format the hard disk during the new installation.Use other tools (such as gdisk.exe) to partition and format the hard disk before the new installation.Your computer boots the unencrypted System Reserved partition, and then decrypts the main encrypted drive and starts the encrypted Windows system.īut you may have no system reserved system if you are in the following cases: The startup files used for BitLocker Drive Encryption: The System Reserved partition is essential if you want to use BitLocker drive encryption, which can’t function otherwise.The Boot Manager and Boot Configuration Data (BCD): When your computer starts, the Windows Boot Manager will read BCD and then the bootloader will start Windows from the system drive (C drive). ![]() Then, what does the system reserved partition do? Actually, it is used to store the following two files: In Windows Disk Management, they are shown like the following picture:Īs you can see in the above picture, the C drive is the boot partition and it contains page file and crash dump the system reserved partition is the active system partition but it has no drive letter. The most important two partitions are system reserved partition and C drive. On the boot disk, there are many partitions. In computer, the hard drive that has operating system installed is called boot disk. ![]() Note: In this post, I will not introduce the software Boot Disk, but the active boot partition in Windows system. ![]()
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