Abstract: A storage array includes a memory and a physical disk, and a plurality of logical disks are created on the physical disk. Each logical disk corresponds to a setting ratio which a preset ratio of a loaded portion of metadata of the logical disk that is loaded into the memory to all the metadata of the logical disk. When metadata about to-be-manipulated data in a manipulated logical disk of the plurality of logical disks is to be written into the memory, the disk array determines whether a current ratio of a loaded portion of metadata of the manipulated logical disk that is loaded into the memory to all the metadata of the manipulated logical disk reaches a setting ratio corresponding to the manipulated logical disk. When the current ratio reaches the setting ratio, the disk array evicts a part of the metadata of the manipulated logical disk in the memory, and stores the metadata about the to-be-manipulated data to the memory.

Abstract: An apparatus and a method for peak shifting adjustment are disclosed. The apparatus includes a controlling unit that is configured to sequentially control different outputting units to output the Pulse-Width Modulation (PWM) signals according to a preset time sequence. The interval between two adjacent outputted PWM signals is T1, which is the time when the current required by an electric device is higher than the normal current in case of an increase of the duty cycle of the PWM signals. At least two outputting units are connected to corresponding electric devices and configured to output the PWM signals to the corresponding electric devices according to the control of the controlling unit.

Abstract: A method for backing up data of a storage system, where at least two mirroring channels are provided between a first mainboard and a second mainboard of a storage system, and the method includes: transmitting data through at least one effective mirroring channel if all the mirroring channels are effective; and transmitting the data through remaining mirroring channel(s) if at least one of the mirroring channels for transmitting the data fails. The method enables traffic to be transmitted evenly on normal mirroring channels, and ensures maximized utilization of the bandwidth of mirroring channels.

Abstract: A storage system and a data transmission method are disclosed in embodiments of the present invention. According to embodiments of the present invention, a storage system contains a master node, and auxiliary nodes at different physical positions, for example, a short-distance auxiliary node and a long-distance auxiliary node, and for auxiliary nodes at different physical positions, different protocols are adopted for data transmission, for example, data is transmitted between the master node and the short-distance auxiliary node by using a SAS protocol through a SAS cable, while data is transmitted between the master node and the long-distance auxiliary node by using a protocol that supports serial long-distance transmission through an optical fiber or a serial cable, thereby minimizing the cost when long-distance data transmission can be implemented.

Abstract: The present invention discloses a communication apparatus. The communication apparatus includes one or more board and a backplane. The board includes a connector and a function processing unit circuit connected to the connector. The backplane includes at least one group of board connectors. Each group of the board connectors includes two board connectors that receive signals from different boards. The board connector includes connection terminals connected to the connector on boards. The two board connectors are distributed up and down, and the connection terminals of the two board connectors are distributed symmetrically around a center. The foregoing communication apparatus and backplane are cost-efficient.

Abstract: An apparatus and a method for peak shifting adjustment are disclosed. The apparatus includes a controlling unit that is configured to sequentially control different outputting units to output the Pulse-Width Modulation (PWM) signals according to a preset time sequence. The interval between two adjacent outputted PWM signals is T1, which is the time when the current required by an electric device is higher than the normal current in case of an increase of the duty cycle of the PWM signals. At least two outputting units are connected to corresponding electric devices and configured to output the PWM signals to the corresponding electric devices according to the control of the controlling unit.

Abstract: The embodiments of the present invention provide a method and an apparatus for controlling a state of a storage device, and a storage device, and relate to the field of electronic technologies. State control information of logic disks in the storage device is obtained; it is judged whether the state control information of all the logic disks in the storage device includes sleep instructions; and the storage device is controlled to switch into a sleep state when the state control information of all the logic disks includes the sleep instructions. The technical solutions may effectively control the storage device to switch into the sleep state, overcome the inconvenience of the read and write operations when the storage device automatically switches into the sleep state, and save the power consumption of the storage device with convenient use.

Abstract: The present invention discloses a hot pluggable fan system and connection apparatus. The system includes at least one fan assembly, and a hot pluggable fan connection apparatus. The hot pluggable fan connection apparatus includes a bottom plate; a crossbar existed on the bottom plate, for dividing the bottom plate into a forepart and a rear part; two side panels located on both sides of the bottom plate and vertical to the crossbar; a beam connected to the two side panels and above the crossbar; and one or more fan baffles combined with the side panels for forming at least one slot for accommodating the fan assembly, the baffles located at the forepart of the bottom plate and parallel to the side panels.

Abstract: A method for backing up data of a storage system, where at least two mirroring channels are provided between a first mainboard and a second mainboard of a storage system, and the method includes: transmitting data through at least one mirroring channel if all the mirroring channels are effective; and transmitting the data through remaining mirroring channel(s) if at least one of the mirroring channels for transmitting the data fails. The present disclosure enables traffic to be transmitted evenly on normal mirroring channels, and ensures maximized utilization of the bandwidth of mirroring channels. Corresponding to the foregoing method, an apparatus for backing up data of a storage system is provided in another embodiment of the present disclosure.

Abstract: The present invention discloses a hot pluggable fan system and connection apparatus. The system includes at least one fan assembly, and a hot pluggable fan connection apparatus. The hot pluggable fan connection apparatus includes a bottom plate; a crossbar existed on the bottom plate, for dividing the bottom plate into a forepart and a rear part; two side panels located on both sides of the bottom plate and vertical to the crossbar; a beam connected to the two side panels and above the crossbar; and one or more fan baffles combined with the side panels for forming at least one slot for accommodating the fan assembly, the baffles located at the forepart of the bottom plate and parallel to the side panels.

Abstract: The present invention discloses a communication apparatus. The communication apparatus includes one or more board and a backplane. The board includes a connector and a function processing unit circuit connected to the connector. The backplane includes at least one group of board connectors. Each group of the board connectors includes two board connectors that receive signals from different boards. The board connector includes connection terminals connected to the connector on boards. The two board connectors are distributed up and down, and the connection terminals of the two board connectors are distributed symmetrically around a center. The foregoing communication apparatus and backplane are cost-efficient.