Disk data protection method and device based on GRUB, equipment and medium

The invention provides a GRUB-based disk data protection method, apparatus and device, and a medium, and belongs to the field of data protection of solid state disks. The method comprises the steps that a first state and a second state are set for a disk, and the disk comprises a customized GRUB program; when the disk is started, entering a first state, in the first state, reading the key feature data by the customized GRUB program, and generating a first identity authentication private key according to the key feature data; the user data storage area of the disk cannot be accessed in the first state; the customized GRUB program verifies the first identity authentication private key, if the authentication of the first identity authentication private key is passed, the disk is switched to the second state, the user data storage area of the disk is unlocked, and if the authentication of the identity authentication private key is not passed, the disk is still in the first state. According to the GRUB-based disk