Methods, devices and computer program products for managing a redundant array of independent disks

An electronic device, comprising:

• at least one processing unit;
• at least one memory coupled to the at least one processing unit and storing instructions for execution by the at least one processing unit, the instructions, when executed by the at least one processing unit, causing the device to perform acts, the acts comprising:
• in response to a number of a plurality of disks occupied by the RAID exceeding a first threshold, determining a first number of disk pairs to be disassociated among the plurality of disks, the first number of disk pairs at least comprising a first disk and a second disk associated with each other, and a first extent in the first disk and a second extent in the second disk being included in a same RAID extent of the RAID;
• determining a third disk among the plurality of disks for migrating at least one of the first extent and the second extent;
• and
• migrating the at least one extent to the third disk to disassociate the first disk and the second disk so that a second number of disk pairs associated with each other among the plurality of disks is below a second threshold.

A computer program product for managing redundant array of independent disks (RAID), the computer program product comprising:

• a non-transitory computer readable medium encoded with computer-executable code, the code configured to enable the execution of:
• in response to a number of a plurality of disks occupied by the RAID exceeding a first threshold, determining a first number of disk pairs to be disassociated among the plurality of disks, the first number of disk pairs at least comprising a first disk and a second disk associated with each other, and a first extent in the first disk and a second extent in the second disk being included in a same RAID extent of the RAID;
• determining a third disk among the plurality of disks for migrating at least one of the first extent and the second extent;
• and
• migrating the at least one extent to the third disk to disassociate the first disk and the second disk so that a second number of disk pairs associated with each other among the plurality of disks is below a second threshold.