Abstract: Embodiments of the present disclosure provide a solution of evaluating a rebuilding performance of a redundant array of independent disks. In some embodiments, there is provided a computer-implemented method, comprising: simulating, based on a first group of redundant arrays of independent disks, a rebuilding process for a second group of redundant arrays of independent disks; obtaining a first performance metric of the simulated rebuilding process; and identifying a factor associated with the rebuilding performance of the second group of redundant arrays of independent disks based on the first performance metric.

Abstract: A liquid crystal lens panel and a display device, and the liquid crystal lens panel includes a first substrate, a second substrate opposite to the first substrate, and a liquid crystal layer between the first substrate and the second substrate, the liquid crystal lens panel further includes a first electrode and a second electrode, the first electrode is provided on the first substrate, the second electrode is provided on the first substrate or the second substrate, the second electrode includes a plurality of electrode units arranged in an array, and each of the plurality of electrode units and the first electrode are configured to form an electric field therebetween, so as to drive the liquid crystal layer to form an equivalent lens unit.

Abstract: The present disclosure relates to a display apparatus and a three-dimensional display method thereof. A via hole at least passing through a base substrate is formed in an array substrate of a liquid crystal display panel, and a signal line on an upper surface of the array substrate can be connected with a driving chip bonded onto an electroluminescent display substrate, through the via hole on a lower surface of the array substrate and through a conductive material in an optical clear adhesive. A signal line on the electroluminescent display substrate also can be connected with a driving chip bonded onto an upper surface of the array substrate, through the conductive material in the optical clear adhesive on a lower surface of the array substrate and through the via hole.

Abstract: A method, computer program product, and computing system for managing wear balance in a mapped RAID storage system. According to embodiments, mapped RAID extents, which are comprised of storage disk extents, are assigned to particular mapped RAID groups based on one or more parameters related to wear experienced by disk extents associated with the RAID extent. Endurance parameters are measured and can be used by machine learning modules to predict future wear levels enabling predictive wear balancing in mapped RAID storage systems. Embodiments can be used when initially forming a mapped RAID group, when adding storage to an existing mapped RAID group, or when managing the ongoing performance of a mapped RAID group or storage system.

Abstract: There is disclosed techniques for use managing data storage. In one embodiment, endurance values are generated in connection with a plurality of solid state drives (SSDs). Each endurance value for an SSD indicating an estimated number of write operations that may be performed on the SSD before the SSD wears out and requires replacement. Additionally, storage space is reserved on one or more of the SSDs such that an endurance level associated with the endurance value of the SSD will have an inverse relationship with the amount of storage space reserved on the SSD.

Abstract: A light guiding assembly and a fabricating method, a backlight module, and a display device are provided. The light guiding assembly includes a waveguide layer, and a coupling grating structure including at least two gratings, wherein at least one of the at least two gratings is located inside the waveguide layer, and orthographic projections of the at least two gratings on a surface of the waveguide layer at least partially overlap, the coupling grating structure being configured such that incident light propagates in the waveguide layer.

Abstract: Embodiments of the present disclosure relate to method and apparatus for scaling out storage devices, and scaled-out storage devices by establishing a cross-device link between a first storage device and a second storage device; exchanging configuration information of at least one of the first storage device and the second storage via the cross-device link; creating, in the first storage device, a shadow object corresponding to a real object in the second storage device; and creating, in the second storage device, a shadow object corresponding to a real object in the first storage device; wherein each shadow object can expose feature and/or state of a corresponding real object to users without implementing a functioning logic of the corresponding real object.

Abstract: Technology for determining an effective capacity of a drive extent pool that is generated from at least one group of storage drives. A sub-group of storage drives having relatively higher physical capacities is selected from the group. The number of storage drives in the sub-group is equal to a total number of drive extents indicated by each entry in a RAID mapping table. Each storage drive in the sub-group is assigned an individual effective capacity equal to an individual physical capacity of a storage drive in the sub-group having the smallest individual physical capacity. Each storage drive in the group not contained in the sub-group is assigned an individual effective capacity equal to its own physical capacity. An effective capacity of the drive extent pool is set to a sum of the all the individual effective capacities assigned to the storage drives in the group of storage drives.

Abstract: A method and apparatus for managing data access comprises: receiving a write request for writing data into one or more storage blocks; in response to determining that a storage block is unavailable, writing a part of the data into a virtual storage block corresponding to the storage block, the part of the data being required to be written into the storage block; and in response to determining that the storage block becomes available, copying the part of the data from the virtual storage block to the storage block. The embodiments of the present disclosure further disclose a corresponding apparatus. By introducing the virtual storage blocks in the data access, the embodiments of the present disclosure can realize the parallel data transfers of a plurality of writes and thus greatly improve the data writing performance of the system.

Abstract: Disclosed is a lens device, including: a first transparent substrate; a second transparent substrate; and a liquid crystal layer filled therebetween. The first transparent substrate is a Fresnel lens, and a surface of the Fresnel lens toward the liquid crystal layer is disposed with grooves which are spaced from one another in accordance with Fresnel wave zones. The second transparent substrate is configured to control state of a liquid crystal, such that a refractive index of the liquid crystal, when polarized light incident into the liquid crystal passes through the liquid crystal, transforms between a first refractive index of the liquid crystal and a second refractive index of the liquid crystal, wherein the first refractive index is greater than the second refractive index, and a refractive index of the Fresnel lens is substantially equal to the first refractive index of the liquid crystal in the liquid crystal layer.

Abstract: A method and a system for delivering a message in a storage system. In one embodiment of the present invention, there is provided a method for delivering a message in a storage system comprising a first controller, a second controller, a first communication area and a second communication area. The method comprises: in response to receiving a message that is to be delivered from the first controller to the second controller, writing the message to the first communication area that is readable and writable to the first controller and readable to the second controller; and writing an address identifier to the second communication area, the address identifier being used for indicating an address at which the second controller reads the message from the first communication area, the second communication area being readable to the first controller and readable and writable to the second controller.

Abstract: A 3D display device is provided. The 3D display device includes a display panel and a light source, the display panel including a first substrate and a second substrate, wherein, the light source is disposed on a side surface of the first substrate, and configured to emit light into the first substrate, wherein, light is propagated in the first substrate in a total reflection manner; the 3D display device further includes a light adjustment structure disposed on a surface of the first substrate facing the second substrate; the light adjustment structure is configured to adjust an emergent direction of light incident into the light adjustment structure from the first substrate, such that a first part of light emerging from the light adjustment structure is propagated in a left eye direction through a first display unit of the display panel, and a second part of light emerging from the light adjustment structure is propagated in a right eye direction through a second display unit of the display panel.

Abstract: A technique for use in managing mapped RAID extents is disclosed. A neighborhood matrix denoting a distribution of neighboring physical storage portions across the N physical storage devices of the pool is created and initialized. A disk extent consumed array denoting a disk consumption metric is created and initialized. Disks in an extent pool are analyzed to identify a least consumed disk in the extent pool and a disk extent is allocated from the identified disk. The allocated disk extent is configured as a first disk extent for a first RAID extent. The neighborhood matrix and disk extent consumed array are updated appropriately. All the disks in the extent pool are analyzed to identify a valid disk extent that will result in the lowest variance value in the neighborhood matrix. The identified valid disk extent is allocated and the neighborhood matrix and disk extent consumed array are again updated.

Abstract: The present disclosure relates to a dispersion apparatus. The dispersion apparatus may include an optical substrate; a grating layer on a first side of the optical substrate; and a light outlet layer on a second side of the optical substrate, the second side opposite the first side of the optical substrate. The grating layer is configured to perform dispersion of incident light into first-order diffracted beams having target wavelengths and transmit the first-order diffracted beams into the optical substrate, and wherein a diffraction angle of each of the first-order diffracted beams having the target wavelengths is smaller than a total reflection angle between the optical substrate and air. The light outlet layer is configured to extract the first-order diffracted beams having the target wavelengths in the optical substrate.

Abstract: A liquid crystal lens, a control method thereof, a liquid crystal lens module and a display device are provided. The liquid crystal lens includes a first transparent substrate and two liquid crystal cells arranged at two opposite sides of the first transparent substrate. Each liquid crystal cell includes a first transparent electrode layer and a second transparent electrode layer; and a liquid crystal layer therebetween. The second transparent electrode layer includes a first electrode sub-layer and a second electrode sub-layer. The first electrode sub-layer includes N concentric first annular electrodes, and the second electrode sub-layer includes N concentric second annular electrodes. The first annular electrodes and the second annular electrodes are alternately arranged in a direction parallel with the first transparent electrode layer. Initial alignment orientations of liquid crystal molecules in liquid crystal layers in the two liquid crystal cells are perpendicular to each other.

Abstract: A display apparatus and a method for controlling the same are provided. The display apparatus includes: a light guide module comprising a light incident region and a light emergent region; a display module, arranged corresponding to the light incident region of the light guide module and configured to display images; and a liquid crystal lens with a plurality of adjustable focal lengths, arranged between the display module and the light guide module and corresponding to the light incident region of the light guide module, and configured to form virtual images with different depths of field for the images displayed on the display module. The light guide module is configured to guide light exited from the liquid crystal lens to propagate in a direction from the light incident region to the light emergent region within the light guide module.

Abstract: Embodiments of the present disclosure relate to methods and apparatuses for data copy. A method comprises receiving, from a client module in a first processing unit, a read request for reading data from a first storage region. The method further comprises, in response to determining from the read request that the data is to be copied, obtaining, from a cache, a first bitmap associated with the first storage region, the first bitmap indicating if the first storage region is filled with zero. The method further comprises, in response to determining from the first bitmap that the first storage region is filled with zero, sending, to the client module, an indication that the data is zero.

Abstract: The embodiments of the present invention provide an optical modulator, a backlight module and a display device. The optical modulator includes a first level modulation unit, a second level modulation unit and a third level modulation unit arranged in sequence. The first level modulation unit is a converging element for converging a light beam emitted from a light source. The second level modulation unit is a collimating element for converting the light beam from the first level modulation unit into a collimated light beam. The third level modulation unit is a redirecting element for converting the collimated light beam from the second level modulation unit into a vertically emitted light beam.

Abstract: Techniques perform I/O management. The techniques involve: 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. Accordingly, disk access is reduced, metadata cache efficiency is increased, I/O performance is improved and the RAID reliability is enhanced.

Abstract: Techniques manage a storage system. Such techniques involve, in response to receiving a request to add a first number of disks to a storage resource pool in the storage system, determining whether the first number of disks are to be added to the storage resource pool in a plurality of phases. Such techniques further involve determining a second number of disks to be added to the storage resource pool in the first phase. Such techniques further involve determining first information on a first disk array group to be created with the second number of disks in the first phase. Such techniques further involve adding the second number of disks to the storage resource pool in the first phase by creating the first disk array group based on the first information. Such techniques enable a user to obtain an available capacity of the extended storage resource pool quickly and efficiently.