The embodiment of the invention provides a disk data
backup method, device and equipment. The method can be used in the
cloud computing field. The method comprises the steps of determining a current moment as an updating moment according to preset updating cycle setting, and obtaining a
directory list recording file and a file
list recording file; obtaining a plurality of catalogs needing to be synchronized from the
source data disk, determining a target catalog needing to be synchronized currently by using the catalog
list record file, and backing up the target catalog in the target data disk; obtaining respective second file information of a plurality of second files from a
directory needing to be synchronized in the
source data disk, for each second file, determining
backup information of the second file to a target data disk by utilizing a file list recording file, and if the second file needs to be backed up, backing up the second file to the target data disk; and updating the
directory list recording file and the file list recording file. The method is used for achieving the effect of efficiently backing up the disk data while fully utilizing the
disk space.