You can change the Rapid Wake settings in VAIO Control Center.
Rapid Wake is enabled by default. With this function, your VAIO enters Sleep mode after your working data is saved on the built-in storage device.
With Rapid Wake disabled:
Your working data is not saved on the built-in storage device when your VAIO computer enters Sleep mode. Therefore, if the computer is turned off during Sleep mode because, for example, the battery pack runs out of power or the computer is disconnected from an AC power source, the working data will be lost. To avoid data loss, be sure to save the data before the computer enters Sleep mode.
If your VAIO computer is equipped with the power indicator, it blinks slowly in orange during Sleep mode. When the battery pack runs out of power during Sleep mode, the charge indicator light blinks. If the computer is equipped with the power indicator, it blinks along with the charge indicator.