Topic
Direct-access storage device
About: Direct-access storage device is a research topic. Over the lifetime, 125 publications have been published within this topic receiving 3116 citations. The topic is also known as: DASD.
Papers published on a yearly basis
Papers
Patent•
IBM1
TL;DR: In this paper, a method and apparatus for effectuating transmission, reception, and processing of source program signals representative of a multimedia program between a remote multimedia server and a plurality of local set-top control systems are disclosed.
Abstract: A method and apparatus for effectuating transmission, reception, and processing of source program signals representative of a multimedia program between a remote multimedia server and a plurality of local set-top control systems are disclosed. The multimedia server processes stored digitally compressed multimedia programs preferably by parsing a selected multimedia program into a customized series of discrete program segments, and transmitting the compressed program segments to a local set-top control system, which buffers and decompresses the compressed program segments for presentation on a local display monitor. A local set-top control system preferably includes a direct access storage device adapted to buffer a predetermined number of compressed program segments received from a multimedia server, some of which may be non-sequentially ordered and others of which may be sequentially ordered. A novel formatting methodology provides for the sequential presentation of the program segments asynchronously distributed on one or more data storage disks disposed in the direct access storage device. A user-definable presentation control window for performing local VCR-type presentation control functions for the portion of a multimedia program buffered in the direct access storage device is also provided through the novel formatting methodology. The novel formatting methodology also provides concurrent presentation and buffering of program segments received from the multimedia server for on-demand viewing of a selected multimedia program.
252 citations
Patent•
IBM1
TL;DR: In this paper, the authors present an apparatus and method for protecting BIOS stored on a direct access storage device into a personnal computer system, which consists of a system processor, a system planar, a random access main memory, read only memory, a protection means and at least one direct access disk device.
Abstract: An apparatus and method for protecting BIOS stored on a direct access storage device into a personnal computer system. The personal computer system comprises a system processor, a system planar, a random access main memory, a read only memory, a protection means and at least one direct access storage device. The read only memory includes a first portion of BIOS and data representing the type of system processor and system planar I/O configuration. The first portion of BIOS initializes the system and the direct access storage device, and resets the protection means in order to read in a master boot record into the random access memory from a protectable partition on the direct access storage device.
205 citations
Patent•
IBM1
TL;DR: In this article, the authors propose a data processing method for storing groups of related information in a storage subsystem of a Data Processing System (DPS) in which the storage subsystem includes one or more storage devices having a plurality of block addressable storage locations (blocks or sectors) each of which stores a predetermined fixed number of bytes of said information.
Abstract: A data processing method for storing groups of related information in a storage subsystem of a data processing system in which the storage subsystem includes one or more storage devices having a plurality of block addressable storage locations (blocks or sectors) each of which stores a predetermined fixed number of bytes of said information. The method includes the step of establishing allocatable increments of storage, called physical partitions, which comprise a predetermined number of contiguous addressable blocks, and initially allocating, in response to a request to the operating system, a preselected number of partitions for each group of related information, where the partitions in each group are not necessarily physically contiguous and where the number that is selected is the minimum number of partitions required to store the group of related information. The method further includes the step of automatically allocating one or more additional partitions, located physically on any device, to a previously allocated group of related partitions, dynamically in response to another request of the operating system. A group of partitions that have been allocated to store a group of related information, such as individual files that are related in a hierarchical file system, is called a "Logical Volume". Logical Volumes may be further combined for administration and data management reasons into a "Volume Group".
181 citations
Patent•
IBM1
TL;DR: In this article, the authors present an apparatus and method for effectuating local reception and processing of source program signals representative of a compressed digital multimedia program received from a remote multimedia server.
Abstract: An apparatus and method for effectuating local reception and processing of source program signals representative of a compressed digital multimedia program received from a remote multimedia server are disclosed. The multimedia server transmits a selected multimedia program as a custom ordered series of discrete program segments to a local set-top control system, which buffers and decompresses the compressed program segments for presentation on a local display monitor. A local set-top control system preferably includes a direct access storage device adapted to buffer a predetermined number of compressed program segments received from a multimedia server, some of which may be non-sequentially ordered and others of which may be sequentially ordered. A novel formatting methodology provides for the sequential presentation of the program segments asynchronously distributed on one or more data storage disks disposed in the direct access storage device. A user-definable presentation control window for performing local VCR-type presentation control functions for the portion of a multimedia program buffered in the direct access storage device is also provided through the novel formatting methodology. The novel formatting methodology also provides concurrent presentation and buffering of program segments received from the multimedia server for on-demand viewing of a selected multimedia program.
165 citations
Patent•
IBM1
TL;DR: In this article, a virtual machine ID (VMID) uniquely associated with a preferred virtual guest is sent to a storage controller along with requests to RESERVE or RELEASE a direct access storage device (DASD).
Abstract: In a virtual machine (VM) environment, a virtual machine ID (VMID) uniquely associated with a preferred virtual guest ( 222 ) is sent to a storage controller ( 108 ) along with requests to RESERVE or RELEASE a direct access storage device (DASD) ( 128 ). The VMID is used by the storage controller ( 108 ) along with a path group ID (PGID) to determine the scope of the RESERVE or RELEASE. Thus, preferred virtual guests ( 216 ) of a single host processor ( 112 ) may share the DASD while both preserving data integrity and operating with the performance benefits of Input/Output (I/O) Assist. Sharing is similarly provided for tape devices with requests to ASSIGN or UNASSIGN.
155 citations
Related Topics (5)
Performance Metrics
| Year | Papers |
|---|---|
| 2016 | 2 |
| 2014 | 2 |
| 2013 | 1 |
| 2012 | 1 |
| 2006 | 1 |
| 2004 | 1 |