Storage system which transfers a command and data corresponding

Details Storage system which transfers a command and data corresponding Storage system which transfers a command and data corresponding

1997-11-24

2000-11-14

Chan, Eddie P.

Electrical computers and digital processing systems: memory

Storage accessing and control

Specific memory composition

711 57, G06F 1314

Patent

active

061483664

ABSTRACT:
In a storage system comprising a disk controller, a disk unit having queue memory for storing the commands, and network between the disk controller and the disk unit, to decrease a overhead in the write processing in issuing a write command to a disk unit, a disk controller designates whether the data be transferred after the command or not depending upon the upper-limit length of the block that can be transferred simultaneously with the write command that is determined between the disk controller and the disk unit at the time of initialization, the disk controller sends the write data to the disk unit together with the write command--when the amount of write data in the write processing is small, and, the disk unit queues the write command and stores the write data onto the cache memory on the disk unit.

REFERENCES:
patent: 5317713 (1994-05-01), Glassburn
patent: 5530948 (1996-06-01), Islam
patent: 5721840 (1998-02-01), Soga
patent: 5745789 (1998-04-01), Kakuta
patent: 5765193 (1998-06-01), Rosich et al.
"Detailed Explanation of SCSI-2 (Latest SCSI Standards and Command Reference)" by Sei-ichi Sugaya, published by CQ Co., pp. 112-119.

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