STEALTH POWER MANAGEMENT IN STORAGE ARRAY

摘要

Increased power savings is provided by powering down idle storage devices and emulating storage device responses to host requests which do not require data access. A virtual target emulates the hard disk drive, has information associated with the hard disk drive, and provides information in response to host requests to satisfy the host. For host requests that do require data access, the storage device is powered on and storage device control is provided to the host. If the storage device is not ready to communicate with a host, a virtual target communicates with the host to emulate the storage device and prevent the host from timing out while the storage device is powering up to get ready.

主权项

1. A method for managing power of a storage device, comprising:
detecting a storage device of a plurality of storage devices in a storage enclosure is in a standby state or has been inactive with respect to host access for a predetermined period of time; receiving a first request from a host for the storage device that does not require access to data on the storage device; transmitting a response that resolves the first request to the host by a virtual target; receiving a second request from the host for the storage device that requires access to data on the storage device; setting the storage device to a power-on state; and processing the second request by virtual target and the storage device.