Patent ID: 7600151

Claim:
A disk array unit capacity expansion interruption recovery handling method for use by a computer platform that is equipped with a disk array unit having a cluster of disks and capable of performing a capacity expansion procedure to add a new disk to the disk cluster, for the purpose of providing the disk array unit with a recovery handling function in the event of an abnormal interruption to the capacity expansion procedure; the disk array unit capacity expansion interruption recovery handling method comprising: during the runtime of the capacity expansion procedure, recording the proceeding status of the capacity expansion procedure and storing the recorded data into a predefined capacity-expansion status table module; in the event of an abnormal interruption to the capacity expansion procedure, responding to a restarting event on the computer platform by checking whether the capacity-expansion status table module records the status of an abnormally-interrupted capacity expansion procedure; if yes, issuing a recovery enable message; responding to the recovery enable message by determining a recovery point based on the checkpoint data about the abnormally-interrupted capacity expansion procedure retrieved from the capacity-expansion status table module; and performing a recovery on the abnormally-interrupted capacity expansion procedure by starting from the recovery point determined by the recovery point determining module.