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Browse Prior Art Database

Multiple Users of One Storage

IP.com Disclosure Number: IPCOM000102894D
Original Publication Date: 1990-Mar-01
Included in the Prior Art Database: 2005-Mar-17
Document File: 1 page(s) / 30K

Publishing Venue

IBM

Related People

McGilvray, BL: AUTHOR [+2]

Abstract

In this design, multiple processors operate out of one physical storage, each having its own private addressing. The processors in this configuration access the storage through a common System Storage Controller (SSC).

This text was extracted from an ASCII text file.
This is the abbreviated version, containing approximately 100% of the total text.

Multiple Users of One Storage

      In this design, multiple processors operate out of one physical
storage, each having its own private addressing. The processors in
this configuration access the storage through a common System Storage
Controller (SSC).

      Each of the processors has its own identifier.  For all storage
references, the Central Processor (CP) sends its identifier along
with the address.  The SSC then does an interrogation of all caches
based upon the CP identifier. In the design, no cross-interrogation
will be done against the other CP's unless they carry the same
identifier.  Given the requestor's identifier, the SSC has a
configuration array to assign the absolute address of each CP to its
own physical location in the storage array.  Likewise, the
Input/Output System (IOS) is sent the CP identifier on all I/O
requests.  The IOS then uses the identifier of the I/O request for
all of its storage requests to the SSC.  The same design would follow
for expanded storage or other sources of data input/output.

      Disclosed anonymously.