Method and system of buffering data written to direct access sto

Details Method and system of buffering data written to direct access sto Method and system of buffering data written to direct access sto

1995-01-23

1997-12-02

Chan, Eddie P.

395465, G06F 1200

Patent

active

056945701

ABSTRACT:
The invention teaches a system and method for temporarily buffering data written to a storage system by a host computer. The storage system includes direct access storage devices and a cache. The cache is used as the buffer for both caching and noncaching data records before destaging to a direct access storage device. Upon receipt of a channel program from a host computer containing data for records to be updated, the storage controller determines if the records are currently cached. If the records are not cached, a write miss has occurred. Upon a write miss the storage controller checks an attribute transmitted in the channel program to determine if the records have a regular format. Records having a known, regular format are buffered in cache until destaged by a background process.

REFERENCES:
patent: 4500954 (1985-02-01), Duke et al.
patent: 4885680 (1989-12-01), Anthony et al.
patent: 4916605 (1990-04-01), Beardsley et al.
patent: 5283884 (1994-02-01), Menon et al.

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