摘要:
A video media storage control system to control a video media storage device, be it for a tape or other storage media, includes means for sending commands to the device to instigate positioning of the video media at a desired position and where the desired position is arrived at automatically by reading the video media to obtain position information, directly or indirectly, and changing the position of the video media until the desired position has been obtained. Positioning may be for record or playback purposes. According to one aspect of the invention selection of the desired position at least for playback is controlled selectively from a display of the index of contents of the video media, which display includes at least one image of the contents and preferably a plurality of images on the media taken at discrete intervals. Positioning of the video media may utilise characterisation data for the video media storage device. More particularly the position information is obtained by reading position data recorded on the tape or alternatively by generating position data from the contents of the video tape for example by reading the tape and generating a data sequence or data value derived from the contents of the tape and storing same in memory in conjunction with position information.
摘要:
A method of inhibiting inadvertent and unauthorized writing and reading of information to and from a storage medium comprises the steps of (a) writing a first code in a predetermined location on the storage medium, the first code being indicative of a first protection mode of the storage medium (112); (b) receiving a command to change the protection mode of the storage medium from the first protection mode to a second protection mode (118); and, in response to the command, (c) writing in the predetermined location on the storage medium, in place of the first code, a second code indicative of the second protection mode (136, 138). A protection mode can inhibit writing to the storage medium, both writing and reading to and from the medium, or neither. Changing of protection modes can also be password protected.
摘要:
A method of adjusting the lateral position of writing on a magnetic tape. Alternate data and servo information is recorded in a first track at a first azimuth angle (B18). Then, a second track is written at a different azimuth angle while leaving a first portion of a first track (B30). Then, a thrid track is written (B38) at the azimuth angle of the first track while inhibiting writing when a servo area is encountered (B42). Servo control takes place based on the amplitude of the servo information read from a head spaced behind the write element (B46, B50).
摘要:
The invention relates to a device and method for providing data exchange and storage. The said device includes a controller module (62) which includes a firmware for controlling operation of each modules in the said data exchange and storage device (60) and performing data processing and information exchange; and an internal storage module (61) for storing data under controlling of the said controller module (62); and a system interface (63) module connecting with system interface and performing data exchange with the said data processing system (10) under controlling of the said controller module (62); and an external storage interface module (64) connecting with external storage equipment and performing data exchange with the external storage equipment under controlling of the said controller module (62). The device can accomplish connection with data processing system of various type interfaces and external storage equipment of various type interfaces. The device can also implements function that the data processing system access to the interior storage module and the external storage equipment, thereby the device of invention can be named an individual moveable storage center for users.
摘要:
A optical recording medium (10) includes a crystallizing layer (7,8) for enhancing the crystallization of a phase change memory layer (3), an energy storage layer for aiding the state transformations of a phase change memory layer (3), and/or a modifying element for increasing absorption and contrast at short wavelengths. An optical data storage and retrieval system ( figure 3 ) containing same. A light-plasmon coupling lens including an optically transparent substrate having a light incident surface and a light-plasmon coupling surface opposite the light incident surface. The light-plasmon coupling surface including at least a set of circular concentric peaks/valleys which form a Fourier sinusoidal pattern in the radial direction of the circular concentric peaks/valleys. A conformal layer of metal is deposited on the light-plasmon coupling surface of the substrate and has aperture at the center of thereof through which plasmons are transmitted.
摘要:
According to one aspect of the invention, methods and systems for operating a magnetic storage media drive to perform read/write operations to magnetic storage media in an overwrite protected mode are provided. In one example, a method includes receiving a write request and associated write data and determining if the magnetic storage medium is overwrite protected. If the storage medium is overwrite protected the method includes writing the write data to the storage medium followed by an EOD marker associated with the end of the write data, allowing write operations to the storage medium after previously written data, and preventing write operations to the storage medium prior to previous EOD markers.
摘要:
A method of inhibiting inadvertent and unauthorized writing and reading of information to and from a storage medium comprises the steps of (a) writing a first code in a predetermined location on the storage medium, the first code being indicative of a first protection mode of the storage medium (112); (b) receiving a command to change the protection mode of the storage medium from the first protection mode to a second protection mode (118); and, in response to the command, (c) writing in the predetermined location on the storage medium, in place of the first code, a second code indicative of the second protection mode (136, 138). A protection mode can inhibit writing to the storage medium, both writing and reading to and from the medium, or neither. Changing of protection modes can also be password protected.