Browse Prior Art Database

Cartridge Handling Systems

IP.com Disclosure Number: IPCOM000080052D
Original Publication Date: 1973-Oct-01
Included in the Prior Art Database: 2005-Feb-26
Document File: 2 page(s) / 41K

Publishing Venue

IBM

Related People

Schaaf, RL: AUTHOR

Abstract

In tape library systems, it is desirable to have alternate paths for selectively accessing tape-containing cartridges for ensuring access to a data base contained in the tape library, as well as enhancing throughput of the system. Relatively small tape libraries may be contained in a rotatable carousel, such as SC-1 to SC-3. As the carousel rotates to an exchanging unit EU, the cartridge becomes available to a processing unit PU-1 or PU-2. The processing units, in turn, communicate with utilization means UM, such as a digital computer.

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Cartridge Handling Systems

In tape library systems, it is desirable to have alternate paths for selectively accessing tape-containing cartridges for ensuring access to a data base contained in the tape library, as well as enhancing throughput of the system. Relatively small tape libraries may be contained in a rotatable carousel, such as SC-1 to SC-3. As the carousel rotates to an exchanging unit EU, the cartridge becomes available to a processing unit PU-1 or PU-2. The processing units, in turn, communicate with utilization means UM, such as a digital computer.

The storage carousel SC-1 may be intermittently operated or continuously rotated depending upon the character of the EU. PU-1 and PU-2 processing units operate on tape cartridges exchanged with SC-1 storage carousel via the two illustrated EU's. If either PU is inoperative, UM can still access a cartridge from SC-1 via the alternate path.

In a more preferred configuration, a pair of PU's, PU-3 and PU-4, is interconnected to a pair of storage carousels SC-2 and SC-3 via EU-1 to EU-4. In this event, either SC-2 or SC-3 can be accessed via either PU, thereby enhancing the probability of access to the tape-containing cartridges while enhancing throughput. Since the EU's operate independent one of the other, the two PU's can queue the cartridges for processing.

SC-2 is shown as a flexible belt containing a larger number of cartridges than a circular carousel SC-3. In this configuration, EU-5 exchanges cartridg...