Modification of when workloads access data units and/or on which storage devices data units are stored to conserve power

A non-transitory computer-readable data storage medium storing computer-executable code that a processor executes to:

• correlate a plurality of workloads to the data units by correlating which of the workloads access which of the data units and determining when each workload accesses a data unit of the plurality of data units, wherein the data units are stored on a plurality of storage devices, each data unit stored on one of the storage devices, wherein a data unit is one of a data file and a data block of a data file;
• modify one or more of when the workloads access the data units, and on which of the storage devices the data units are stored, so that at given times the data units stored on a sub-plurality of the storage devices are not being accessed by any workload;
• and
• during each given time, power off the sub-plurality of the storage devices storing the data units that are not being accessed by any workload to conserve power.

A system comprising:

• a plurality of storage devices on which a plurality of data units are stored, each data unit stored on one of the storage devices;
• a processor;
• and
• a non-transitory computer-readable data storage medium storing computer-executable code that a processor executes to:
• correlate a plurality of workloads to the data units by correlating which of the workloads access which of the data units and determining when each workload accesses a data unit of the plurality of data units, wherein the data units are stored on a plurality of storage devices, each data unit stored on one of the storage devices, wherein a data unit is one of a data file and a data block of a data file;
• modify one or more of when the workloads access the data units, and on which of the storage devices the data units are stored, so that at given times the data units stored on a sub-plurality of the storage devices are not being accessed by any workload;
• and
• during each given time, power off the sub-plurality of the storage devices storing the data units that are not being accessed by any workload to conserve power.