Embodiments of the present application provide a
metadata management and
data reconstruction method and device, and a storage medium. In an embodiment of that present application, the
RAID technologyis used to organize and manage the storage resources in the storage
system, Aiming at the hard disk domain in the storage
system, the
metadata in the hard disk domain is organized and managed according to the
RAID technology. When the hard disk domain is created, the ID of the hard disk domain and the ID of each physical hard disk under the hard disk domain are stored in the attribute descriptionarea of each hard disk. When the
storage pool is built, the relationship between the
storage pool and the hard disk domain and the mapping relationship between the
storage pool and the chunking groupcontained in the storage
pool are stored in the attribute description area of each hard disk. Based on the
metadata organization structure, when the physical hard disk in the hard disk domain has a hard disk failure, other blocks belonging to the same
block group can be quickly indexed according to the information stored in the attribute description area, which is helpful to improve the reconstruction speed of the data stored in the physical hard disk.