System for storing and managing plural logical volumes in each of several physical volumes including automatically creating logical volumes in peripheral data storage subsystem
August 13, 2013. Estimated Expiration Date is calculated based on simple USPTO term provisions. It does not account for terminal disclaimers, term adjustments, failure to pay maintenance fees, or other factors which might affect the term of a patent.Patent ReferencesMethod and apparatus for assigning data sets to virtual volumes in a mass store Information-signal recording apparatus employing record volume oriented identification signals Storage element reconfiguration Controlling asynchronously operating peripherals Data processing system with mixed media memory packs Allocating data storage space of peripheral data storage devices using implied allocation based on user parameters Data processing method to create virtual disks from non-contiguous groups of logically contiguous addressable blocks of direct access storage device Method and apparatus for controlling data writing in magnetic recording subsystem Idle demount in an automated storage library Incremental disk backup system for a dynamically mapped data storage subsystem InventorsApplicationNo. 075936 filed on 06/14/1993US Classes:711/111, Accessing dynamic storage device360/49, Address coding710/3, Input/Output addressing711/4Dynamic-type storage device (e.g., disk, tape, drum)ExaminersPrimary: Lee, Thomas C.Assistant: Meky, Moustafa M. Attorney, Agent or FirmInternational ClassG06F 013/24AbstractA peripheral data storage subsystem has means for responding to a MOUNT command received from a host processor to create and mount a host-processor-addressable logical data-storage volume. Such logical data-storage volume has a serial number VOLSER indicated in the MOUNT command. The logical data volume is assigned a predetermined area of a physical data volume, such area being termed a partition. The illustrated embodiment shows a tape subsystem in which the partitions are accessed by a control using a reel tachometer that identifies segments of the tape. Each partition has a number of the tape segments. Controls and methods are described for initializing the subsystem for effecting the automatic volume creation, appending data into a logical volume, how logical volumes are made to be portable, moving logical volumes amongst diverse physical media, tape formats usable for such logical volumes, data base control of the logical volumes and volume creation processing. The physical volume in which one or more logical volumes reside is not host-processor addressable. Some physical volumes are ejectable from the data storage subsystem. The physical volumes storing the logical volumes are not ejectable. To eject a logical volume, it is copied from the storing physical volume to an ejectable physical volume.Other References
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