Method and apparatus for failure recovery of storage device

An apparatus for failure recovery of a storage device, comprising:

• a storage unit configured to store one or more programs;
• a processor coupled to the storage unit and configured to perform the one or more programs to cause the apparatus to perform acts comprising:
• determining, based on failure data indicating at least one failed disk, whether the at least one failed disk comprises a system disk associated with an extent pool of the storage device, the extent pool being built based on system disks and user disks;
• in response to determining that the at least one failed disk comprises the system disk, rebuilding user data of the system disk to one or more further disks associated with the extent pool;
• and
• in response to the system disk being replaced with an updated system disk, restoring the rebuilt user data from the one or more further disks to the updated system disk, an association of the system disk with the extent pool being maintained until the system disk is replaced by the updated system disk;
• wherein determining whether the at least one failed disk comprises the system disk associated with the extent pool comprises:
• determining whether slot number of a failed disk of the at least one failed disk is a predetermined slot number;
• in response to determining that the slot number is the predetermined slot number, determining that the at least one failed disk comprises the system disk.

A computer program product having a non-transitory computer readable medium which stores a set of instructions to perform failure recovery of a storage device;

• the set of instructions, when carried out by computerized circuitry, causing the computerized circuitry to perform a method of:
• determining, based on failure data indicating at least one failed disk, whether the at least one failed disk comprises a system disk associated with an extent pool of the storage device, the extent pool being built based on system disks and user disks;
• in response to determining that the at least one failed disk comprises the system disk, rebuilding user data of the system disk to one or more further disks associated with the extent pool;
• and
• in response to the system disk being replaced with an updated system disk, restoring the rebuilt user data from the one or more further disks to the updated system disk, an association of the system disk with the extent pool being maintained until the system disk is replaced by the updated system disk;
• wherein determining whether the at least one failed disk comprises the system disk associated with the extent pool comprises:
• determining whether a slot number of a failed disk of the at least one failed disk is a predetermined slot number;
• in response to determining that the slot number is the predetermined slot number, determining that the at least one failed disk comprises the system disk.

A method for failure recovery of a storage device, comprising:

• determining, based on failure data indicating at least one failed disk, whether the at least one failed disk comprises a system disk associated with an extent pool of the storage device, the extent pool being built based on system disks and user disks;
• in response to determining that the at least one failed disk comprises the system disk, rebuilding user data of the system disk to one or more further disks associated with the extent pool;
• and
• in response to the system disk being replaced with an updated system disk, restoring the rebuilt user data from the one or more further disks to the updated system disk, an association of the system disk with the extent pool being maintained until the system disk is replaced by the updated system disk;
• wherein rebuilding the data of the system disk to the one or more further disks associated with the extent pool comprises:
• comparing a failure duration of the system disk with a predetermined duration;
• in response to the failure duration exceeding the predetermined duration, rebuilding all data of the system disk to the further disk;
• and
• in response to the failure duration not exceeding the predetermined duration, rebuilding changed data of the failed system disk to the system disk.