STORAGE SYSTEM AND METHOD FOR REDUCING ENERGY CONSUMPTION

摘要

A system and method that include configuring local disk drives of a local storage system so that at any given point of time, a first part of the local disk drives operate in a low power state and a second part of the local disk drives operate in an active state; and in response to a read request of a data portion on a local disk drive of the local disk drives: determining whether the local disk drive currently operates in the low power state; reading the data portion from the local disk drive, if the local disk drive does not currently operate in the low power state; if the local disk drive currently operates in the low power state, enquiring if a remote mirror disk drive that stores a copy of the data portion currently operates in the low power state; wherein the remote mirror disk drive is comprised in a remote storage system that is coupled to the local storage system; and if the remote mirror disk drive does not currently operate in the low power state, requesting from the remote storage system to read the copy of the data portion from the remote minor disk drive.

主权项

1. A method of reading a data portion, the method comprising:
configuring local disk drives of a local storage system so that at any given point of time, a first part of the local disk drives operate in a low power state and a second part of the local disk drives operate in an active state, wherein the local disk drives are operable to switch between the low power state and the active state; and in response to a read request of a data portion on a local disk drive of the local disk drives: determining whether the local disk drive currently operates in the low power state; reading the data portion from the local disk drive, if the local disk drive does not currently operate in the low power state; if the local disk drive currently operates in the low power state, enquiring if a remote mirror disk drive that stores a copy of the data portion currently operates in the low power state; wherein the remote mirror disk drive is comprised in a remote storage system that is coupled to the local storage system; and if the remote minor disk drive does not currently operate in the low power state, requesting by the local storage system from the remote storage system to read the copy of the data portion from the remote minor disk drive.