Teach you to distinguish between Windows system standby, hibernation, sleep

Windows operating system has long been added to standby, hibernation and other modes, and Windows7 has added a new mode called sleep, but many people still used to completely shut down the computer when not using it. In fact, by making full use of these modes, we can not only save power consumption, but also restore the system to normal operation in the shortest possible time. The definitions of these three modes are as follows:

Standby

After switching the system to this mode, except for the memory, the power supply of other devices on the computer will be interrupted, and only the memory is maintained by the power. The data (because the memory is volatile, as long as the power is turned off, the data is gone). This way, when you want to restore, you can directly restore to the pre-standby state. This mode is not completely power-hungry, so if there is an abnormality in the power supply during standby (such as power failure), then the next time you can only reboot, so the unsaved data before standby will be lost. However, this mode has the fastest recovery speed and can be recovered within five seconds.

Hibernate

After switching the system to this mode, the system will automatically transfer all the data in the memory to a hibernation file on the hard disk, and then cut off the power supply to all devices. . In this way, when restoring, the system will read the contents of the hibernation file directly into the memory from the hard disk and return to the state before the hibernation. This mode does not consume power at all, so it is not afraid of power supply abnormality after hibernation, but the cost is that it requires a hard disk space of the same size as physical memory (fortunately, the current hard disk has already crossed the TB level, and the large-capacity hard disk is getting cheaper and cheaper). The recovery speed of this mode is slow, depending on the memory size and hard disk speed, it usually takes about 1 minute or even longer.

Sleep

is a new mode in Windows 7, which combines all the advantages of standby and hibernation. After switching the system to sleep state, the system will transfer all the data in the memory to the hibernation file on the hard disk (this is similar to hibernation), then turn off the power supply of all devices except memory, so that the data in the memory is still maintained. (This is similar to standby). In this way, when we want to recover, if there is no abnormality in the power supply during sleep, we can recover directly from the data in the memory (like standby), and the speed is very fast; but if the power supply during the sleep is abnormal, the memory The data has been lost and can be recovered from the hard drive (like hibernation), but the speed will be slower. However, this mode will not cause data loss anyway.

Because the sleep function has so many advantages, the power button on the Windows 7 Start menu will switch the system to sleep mode by default. So we can make full use of this new feature, after all, recovery from sleep, the speed is much faster than starting from scratch. Moreover, the sleep mode is not always going on. If the system enters the sleep mode for a period of time (the specific time can be set) and is not awakened, it will be automatically put into the sleep state, and the power supply to the memory is turned off to further save energy. .