System for controlling a write operation involving data held in

Details System for controlling a write operation involving data held in System for controlling a write operation involving data held in

1996-07-09

1998-06-09

Lane, Jack A.

Electrical computers and digital processing systems: memory

Storage accessing and control

Hierarchical memories

711160, 711 4, G06F 1200

Patent

active

057651930

ABSTRACT:
A data storage system includes a multi-tasking processor which manages a write cache to identify adjacent blocks held in the write cache which are to be included in a next write operation, while at the same time handling data transfer requests from a system host. The processor monitors the write cache and when the cache has fewer than a predetermined number of storage locations free, initiates a block-merge task. The processor then determines which block in the write cache is least recently used and, based on virtual block numbers assigned to the data blocks, identifies the blocks in the write cache which are adjacent to the least recently used block and are within the same chunk as that block. The processor maintains a list of these adjacent blocks and the locations in which the blocks are held in the write cache. Thereafter, when the cache has fewer than a lower predetermined number of adjacent blocks free, the processor transfers block identifiers and the addresses of the blocks in the write cache to the data storage device, which allows the data storage device to retrieve the data blocks from the write cache in the order in which they are to be stored on the storage device.

REFERENCES:
patent: 4636946 (1987-01-01), Hartung et al.
patent: 5420983 (1995-05-01), Noya et al.

Affiliated with

Also associated with

Rating

System for controlling a write operation involving data held in does not yet have a rating. At this time, there are no reviews or comments for this patent.

If you have personal experience with System for controlling a write operation involving data held in , we encourage you to share that experience with our LandOfFree.com community. Your opinion is very important and System for controlling a write operation involving data held in will most certainly appreciate the feedback.

Rate now

Comments { 0 }

Profile ID: LFUS-PAI-O-2216348