Boot methods for use in a computer system. The computer system boots from a partition comprising an OS in hibernation mode. The OS exits the hibernation mode to a normal operating mode according to a hibernation file, and marks the hibernation file. The marked hibernation file is modified to the original hibernation file, and access to the partition returns to being monitored. If a write request to the partition is received, the data is discarded or written to another partition or a system memory of the computer system, and a write completion message is replied. If the computer system reboots, the OS also returns to the normal operating mode according to the original hibernation file.