Multiple zone multiple disk video recording system
Single disk emulation interface for an array of synchronous spindle disk drives
Arrayed disk drive system and method
Parallel I/O network file server architecture
Data storage apparatus and method
Disk array controller with parity capabilities
Single disk emulation interface for an array of asynchronously operating disk drives
Method for controlling disk array operations by receiving logical disk requests and translating the requests to multiple physical disk specific commands
Parallel disk storage array system with independent drive operation mode
Disk drive array with request fragmentation
ApplicationNo. 866671 filed on 06/02/1997
US Classes:709/219, Accessing a remote server370/486, Program distribution709/231Computer-to-computer data streaming
ExaminersPrimary: Rinehart, Mark H.
Attorney, Agent or Firm
International ClassesG06F 013/38
AbstractA method and apparatus for delivering multimedia video data from a server (host processor) to a plurality of clients connected to a communications network. More specifically, with this invention, preprocessed video and multimedia data packets are striped across disks in units of fixed playback time, even if such units result in variable length stripes. To deliver multiple video or continuous media streams, the disks in the array are accessed simultaneously so that at any given instance, different disks are accessing the video or multimedia data for different streams. Access to the disks for reading the continuous media files is scheduled periodically, with the period equal to the back time of the stripes. Because each disk read command retrieves data for a fixed play back time, if the first read command for a continuous media stream request can be scheduled to complete on a disk within a playback time, all subsequent read commands are also guaranteed to not interfere with read commands of other streams. Data is delivered directly from the disk array to the communication network by a stream controller without being sent to the host system. Disk storage is utilized efficiently by allocating disk space in units of cylinders and storing the variable size stripes of video in packed format.