US 2003/0149836 A1 · Storage device and method for data sharing

Abstract

In a computer system including a disk subsystem having channel interface compatible to a count-key-data format and a SCSI interface compatible to a fixed length data format, the disk subsystem is connected to a CPU controlled by an open system operating system through the SCSI interface, and connected to an other CPU controlled by a main frame operating system through the channel interface. The CPU is provided with a CKD record access library and a VSAM access library which accesses in a FBA format the VSAM record stored by the other CPU in a CKD format in the disk subsystem and allows the access by an application program of the CPU as a VSAM record based on VSAM control information.

Claims1

Dependent claims

A computer system including a storage device having an interface compatible to a count-key-data format and an interface compatible to a fixed length data format comprising:

means for mutually transforming between a record address in the count-key-data format designated by a cylinder number, a head number and a record number and an address in the fixed length data format designated by a logical block address;
means for allowing the access to a record stored in said storage device in the count-key-data format by the interface compatible to the fixed length data format;
means for extracting only user data from said record;
and
means for interpreting the user data of said record in accordance with a predetermined format for utilization.

2 more elements

Dependencies are inferred from the claim text.

Facts

Application

10/379,571Filed 6 Mar 2003

Priority

JP 08-00713619 Jan 1996

Published

7 Aug 2003

Term ends

Not estimatedThe source records don’t support an estimate.

Classification11 codes

G06F 3/0601
Digital input from, or digital output to, record carriers , e.g. RAID, emulated record carriers or networked record carriers: interfaces specially…
G06F 3/0607
Improving or facilitating administration, e.g. storage management: by facilitating the process of upgrading existing storage systems, e.g. for…
G06F 3/061
Specifically adapted to achieve a particular effect: improving I/O performance
G06F 3/064
Organizing or formatting or addressing of data: management of blocks

Family

Application08/774,447Continuation · filed 30 Dec 1996

Application09/256,472Continuation · filed 23 Feb 1999

Application09/315,819Continuation · filed 21 May 1999

Application09/467,211Continuation · filed 20 Dec 1999

Application09/873,359Continuation · filed 5 Jun 2001

Application10/379,571Continuation · filed 6 Mar 2003

US 2001/0029569 A1Published application

US 5,907,858 ARelated patent

US 5,983,317 ARelated patent

US 6,041,391 ARelated patent

US 6,275,910 B1Related patent