Method, electronic device and computer readable storage medium for i/o management

An electronic device, comprising:

• a processing unit;
• and
• a memory storing instructions which, when executed by the processing unit, cause the electronic device to:
• in response to receiving an input/output (I/O) request for a redundant array of independent disks (RAID), determine a stripe of the RAID related to the I/O request,
• determine metadata corresponding to the stripe, the metadata indicating validity of current data in a corresponding data block of the RAID, the data block comprising one or more stripes,
• in response to the metadata indicating that the current data is valid, execute the I/O request by accessing the RAID, and
• in response to the metadata indicating that the current data is invalid, respond to the I/O request with zero data as the current data.

A computer program product having a non-transitory computer readable medium which stores a set of instructions to perform input/output (I/O) management;

• the set of instructions, when carried out by computerized circuitry, causing the computerized circuitry to perform a method of:
• in response to receiving an I/O request for a redundant array of independent disks (RAID), determining a stripe of the RAID related to the I/O request;
• determining metadata corresponding to the stripe, the metadata indicating validity of current data in a corresponding data block of the RAID, the data block comprising one or more stripes;
• in response to the metadata indicating that the current data is valid, executing the I/O request by accessing the RAID;
• and
• in response to the metadata indicating that the current data is invalid, responding to the I/O request with zero data as the current data.