Browse Prior Art Database

Auditing Mass Storage Systems

IP.com Disclosure Number: IPCOM000085425D
Original Publication Date: 1976-Apr-01
Included in the Prior Art Database: 2005-Mar-02
Document File: 3 page(s) / 112K

Publishing Venue

IBM

Related People

Lester, FE: AUTHOR [+4]

Abstract

A mass storage system (MSS) services a plurality of hosts under the general supervision of a primary host. Each MSS includes a mass storage control (MSC); a staging adapter director (DIRSA), which serves as a port for transferring data signals between any of the hosts; and a disk staging data storage facility (DSF). Further, the data bases are stored on tape cartridges in a mass storage facility (MSF) having a multiplicity of cartridge storage cells, which are movable to data recording devices (DRD's), not shown, for recording and reproducing data signals to exchange them with the DSF. MSC controls the interchange of data signals under the indicated control lines and keys an inventory table of contents of the stored data signals, i.e., in DSF, in MSF, plus the location of each cartridge in MSF.

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Auditing Mass Storage Systems

A mass storage system (MSS) services a plurality of hosts under the general supervision of a primary host. Each MSS includes a mass storage control (MSC); a staging adapter director (DIRSA), which serves as a port for transferring data signals between any of the hosts; and a disk staging data storage facility (DSF). Further, the data bases are stored on tape cartridges in a mass storage facility (MSF) having a multiplicity of cartridge storage cells, which are movable to data recording devices (DRD's), not shown, for recording and reproducing data signals to exchange them with the DSF. MSC controls the interchange of data signals under the indicated control lines and keys an inventory table of contents of the stored data signals, i.e., in DSF, in MSF, plus the location of each cartridge in MSF.

Upon detection of an error or series of errors in MSS, a systems programmer may decide that verification of MSC tables against actual status is desired, i.e., compare MSC table entries with actual data cartridge locations. The system programmer job control languages (JCL's ) a utility program into the primary host for achieving the desired verifications.

The primary host operates using an IBM 370 VS operating system. Access method services (AMS) couple the 370 VS to FSR, functional support routine, for achieving verification by any one of three routines, the MAP routine and the CHECK and READ LABEL routines.

These routines are independently initiated, as will become apparent. MAP verifies whether or not each storage cell in MSF contains a data cartridge. Then, MAP causes the primary host output printer, not shown, to generate a MAP of MSF showing whether or not each of the storage cells has or does not have a data cartridge. It also sums the number of empty a...