Logical track write scheduling system for a parallel disk drive

Details Logical track write scheduling system for a parallel disk drive Logical track write scheduling system for a parallel disk drive

1990-04-16

1992-06-23

Smith, Jerry

Excavating

G06F 1100

Patent

active

051249871

ABSTRACT:
The parallel disk drive array data storage subsystem maps between virtual and physical data storage devices and schedules the writing of data to these devices. The data storage subsytem functions as a conventional large form factor disk drive memory, using an array of redundancy groups, each containing N+M disk drives. A performance improvement is obtained by eliminating redundancy data updates in the redundancy group by writing modified virtual track instances into previously emptied logical tracks and marking the data contained in the previous virtual track instance location as invalid. Logical cylinders containing a mixture of valid and invalid virtual tracks are emptied by writing all the valid virtual tracks into a previously emptied logical cylinder as a background process.

REFERENCES:
patent: 4204634 (1980-05-01), Borsuhn et al.
patent: 4254500 (1981-03-01), Brookhart
patent: 4653050 (1987-03-01), Vaillancourt
patent: 4771375 (1988-09-01), Beglin et al.
patent: 4896259 (1990-01-01), Jacobs et al.
patent: 4899342 (1990-02-01), Potter et al.
patent: 4942575 (1990-07-01), Earnshaw et al.
David L. Butlman; High Performance SCSI Using Parallel Drive Technology; Feb. 22-25, 1988; BUSCON WEST Bus/Board Users Show and Conference.
David A. Patterson, et al.; A Case for Redundant Arrays of Inexpensive Disks (RAID); Jun. 1-3, 1988; ACM SIGMOD Conference in Chicago, IL.
David A. Patterson et al.; Introduction to Redundant Arrays of Inexpensive Disks (RAID); Feb. 27-Mar. 3, 1989; Thirty-Fourth IEEE Computer Society International Conference in San Francisco, CA.
A Case for Redundant Arrays of Inexpensive Disks (RAID), Patterson et al., ACM SIGMOND Conference Jun. 1988.
Hayes, Computer Architecture and Organization, .COPYRGT.1978, pp. 361-364.
IBM Tech. Dics. Bull., vol. 31, No. 10, pp. 141-142, Mar. 1989.

Affiliated with

Also associated with

Rating

Logical track write scheduling system for a parallel disk drive does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with Logical track write scheduling system for a parallel disk drive , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and Logical track write scheduling system for a parallel disk drive will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-939292