Target management method for data backup to a shared transfer station, multiple media element device

• US 5,386,545 A
• Filed: 09/25/1992
• Issued: 01/31/1995
• Est. Priority Date: 09/25/1992
• Status: Expired due to Term

• Current Assignee: Quantum Corporation (Chi Ko Investment Co., Ltd.)
• Original Assignee: Archive Corp. (Whitehouse Group Ltd.)
• Inventors: Gombos, Richard G. Jr., Pisello, Thomas
• Primary Examiner(s): Kriess, Kevin A.
• Assistant Examiner(s): BUTLER, DENNIS
• Application Number:
  US07/951,055
• Time in Patent Office: 858 Days
• Field of Search: 360/71, 360/91, 360/92, 369/30, 369/34, 395/575, 395/700, 364/236.2, 364/236.3, 364/248.1, 364/248.2, 364/252, 364/268, 364/268.2, 364/285.1, 364/952.4, 364/952.5, 364/968.970
• US Class Current: 707/640
• CPC Class Codes: G06F 2003/0697 device management, e.g. handlers, drivers, I/O schedulers
• CPC Class Codes: G06F 3/0601 Interfaces specially adapted for storage systems
• CPC Class Codes: G06F 3/0605 by facilitating the interaction with a user or administrator
• CPC Class Codes: G06F 3/0629 Configuration or reconfiguration of storage systems
• CPC Class Codes: G06F 3/065 Replication mechanisms
• CPC Class Codes: G06F 3/0686 Libraries, e.g. tape libraries, jukebox
• CPC Class Codes: G11B 15/689 Control of the cassette changing arrangement
• CPC Class Codes: Y10S 707/99955 Archiving or backup

Abstract

A method is disclosed for specifying subsets and orders of processing of a set of target media elements utilized with a shared data transfer element in the backup of computer data to a data storage target device. Names assigned to selected target media configurations are used to designate logical groupings for storage and recall. In a described embodiment, a selected target configuration, chosen by name, is used to control the robotics of a tape cartridge backup system in coordination with the transfer of data to a tape drive read/write head, to automatically load tapes from user-designated slots of a tape magazine, in user-specified order, into the drive.

Claims

1. A method of transferring digital data between a primary data storage system and one or more of a plurality of physically discrete, data storage media elements, where each of the data storage media elements is operatively and interchangeably engageable, one at a time, with a corresponding one of one or more shared media element drives of an automated element handling system, the element handling system being operatively coupled to the primary data storage system for effectuating data transfer therewith and the element handling system having one or more media element changers for automatically loading, and subsequently unloading, desired, physically available ones of the media elements into operative engagement with the corresponding one or more shared media element drives so that data transfer can take place between the loaded one or more shared media element drives and the primary data storage system, the method comprising the steps of:

(a) identifying from among said plurality of data storage media element, a set of available media elements that are each either already loaded in the one or more shared media element drives or are each available for automatic loading into the one or more media element drives by said one or more media element changers;

(b) displaying the identified set of available media elements to a user;

(c) enabling the user to select one or more of the identified media elements from the displayed set;

(d) defining all or a subset of the available media elements as a first selected set in accordance with the selection made by the user from the displayed set of available media elements;

(e) recording the definition of the first selected set;

(f) in response to the recorded definition of the selected set, controlling the one or more media element changers to load, where necessary, one or more of the media elements of the corresponding selected set into operative engagement with the one or more shared media element drives; and

(g) in coordination with the loading by the one or more media element changers, transferring data between the primary data storage system and the one or more media elements of the selected set that are loaded into the one or more shared media element drives.

2. The method of claim 1, further comprising, for the case where the user selects at least two media elements from the displayed set of available media elements, the steps of:

(h) enabling the user to indicate a sequence for the two or more of the identified media elements selected from the displayed set;

(i) defining and recording a first order of processing for the first selected set of available media elements corresponding to the sequence indicated by the user; and

wherein the controlling step (f) and the coordinated data transfer step (g) further comprise, in response to the defined and recorded order of processing, causing the one or more media changers to load the media elements, as necessary, and causing the one or more shared media element drives to operate such that data is sequentially transferred between the primary data storage system and one or more media elements of the corresponding selected set in accordance with the correspondingly defined and recorded order of processing.

3. The method of claim 1, further comprising the steps of:

(h) after recording the definition of the first selected set;

(h.1) enabling the user for a second time to select one or more of the identified media elements from the displayed set;

(h.2) defining all or a subset of the available media elements as a second selected set in accordance with the second selection made by the user from the displayed set of available media elements;

(h.3) recording the definition of the second selected set; and

(i) after said recordings (e, h.3) of the definitions of the first and second selected sets;

(i.1) recalling a desired one of the recorded definitions of the first and second selected sets; and

(i.2) using the recalled definition as the responded-to definition in said load control and data transfer steps, (f) and (g), such that said data transfer takes place between the primary data storage system and one or more media elements in the set of the recalled definition.

4. The method of claim 3, further comprising the steps of;

(j) assigning a first name to the recorded definition of the first selected set;

(k) assigning a second name to the recorded definition of the second selected set; and

(l) using the assigned first or second name in said recalling step (i.1) to recall the desired one of the recorded definitions of the first and second selected sets

5. The method of claim 3, wherein at least one media element is common to the definition of both the first and second selected sets.

6. The method of claim 3, further comprising, for the case where the user selects at least media elements from the displayed set of available media elements for each of the first and second selections, the steps of:

(j) enabling the user to indicate respective first and second sequences for the two or more identified media elements selected from the displayed set in the respective first and second selections;

(k) defining and recording respective first and second orders of processing for the first and second selected sets of the available media elements corresponding to the first and second sequences indicated by the user;

(l) recalling a desired one of the first and second orders of processing; and

(m) wherein the controlling step (f) and the coordinated data transfer step (g) further comprise, in response to the recalled one of the defined and recorded first and second orders of processing, causing the one or more media changers to load the media elements, where necessary, and causing the one or more shared media element drives to operate such that data is sequentially transferred between the primary data storage system and one or more media elements of the corresponding selected set in accordance with the correspondingly recalled order of processing.

7. A data transfer method according to claim 1 wherein said automated element handling system has at least two media changers.

8. A data transfer method according to claim 1 wherein said automated element handling system has at least two shared media element drives.

9. A data transfer method according to claim 8 wherein said at least two shared media element drives are operatively coupled to one another by a SCSI bus.

10. A data transfer method according to claim 9 wherein said automated element handling system has at least two media changers operatively coupled to and controlled over said SCSI bus.

11. A data transfer method according to claim 1 wherein said automated element handling system is operatively coupled to the primary data storage system by a SCSI bus and the one or more media changers are controlled over said SCSI bus.

15. A method as in claim 8, further comprising the steps of:

after said step (f) of recording the definition of the first selected set and the corresponding first order of processing,

(f.1) enabling the user for a second time to select one or more of the identified cartridges from the displayed list and to indicate a desired second sequence of access for the selected cartridges;

(f.2) defining all or a subset of the listed cartridges as a second selected set in accordance with the second selection made by the user from the displayed set of available media elements;

(f.3) defining a second order of processing for the second selected set of available cartridges corresponding to the second sequence of access indicated by the user;

(f.4) storing the second selected set and the second order of processing under a second name; and

during said step (g), recalling one of the first or second selected sets and processing orders using the corresponding first or second name.

12. A method for transferring digital data between a primary data storage system and one or more of a plurality of physically discrete, data storage media elements, where each of the data storage media elements is operatively and interchangeably engageable, one at a time, with a corresponding one of one or more shared media element drives of an automated element handling system, the element handling system being operatively coupled to the primary system for effectuating data transfer therewith and the element handling system having one or more media element changers for automatically loading, and subsequently unloadings desired, physically available ones of the media elements into operative engagement with the corresponding one or more shared media element drives so that data transfer can take place between the loaded one or more shared media element drives and the primary data storage system, the method comprising the steps of:

(a) identifying from among said plurality of data media elements, a first set of available media elements that are each either already loaded in the one or more shared media element drives or are each available for automatic loading into the one or more media element drives said one or more media element changers, said identified first set of media elements being further limited to those that are logically available in accordance with predefined logical availability criteria, to a corresponding first user, or to a corresponding first user group or to a corresponding first processing task;

(b) displaying the identified set of available media elements to an authorized user;

(c) enabling the authorized user to select at least two of the identified media elements from the displayed set;

(d) defining all or a subset of the at least two available media elements as a first selected set accordance with the selection made by the authorized user from the displayed set of available media elements;

(e) recording the definition of the first selected set;

(f) enabling the authorized user to indicate a corresponding sequence for the at least two identified media elements selected from the displayed set;

(g) defining and recording a first order of processing media elements corresponding to the for the first selected set of the at least two available media elements corresponding to the sequence indicated by the authorized user;

said recorded first order of processing designating a corresponding first sequence of access to be followed for the first selected set of media elements during a corresponding data transfer;

(h) recalling the recorded definition of the selected set and the corresponding recorded order of processing;

(i) in response to the recalled definition of the selected set and the recalled, corresponding order of processing, controlling the one or more media element changers to load, where necessary, one or more of the media elements of the corresponding selected set into operative engagement with the one or more shared media element drives such that data transfer can take place between the loaded one or more shared media element drives and the primary data storage system in accordance with the recalled recorded definition of the selected set and the corresponding recorded order of processing; and

(k) in coordination with the loading by the one or more media element changers, and in accordance with the recalled recorded definition of the selected set and the corresponding recorded order of processing, transferring data between the primary data storage system and the one or more media elements of the selected set that are loaded into the one or more shared media element drives.

13. A method for backing-up computer data by transferring the data from a primary storage system to a plurality of data storage cartridges available within an automatic cartridge access system having a robotic mechanism for automatically loading and unloading the available cartridges between predesignated slots of a cartridge magazine and a shared cartridge drive, the method comprising the steps of:

(a) identifying the available cartridges and a corresponding set of slots of the cartridge magazine;

(b) displaying a list representing the identified, available cartridges to a user;

(c) enabling the user to select one or more of identified cartridges from the displayed list and to indicate a desired first sequence of access for the selected cartridge;

(d) defining all or a subset of the available cartridges as a first selected set in accordance with the selection made by the user from the displayed list of available cartridges;

(e) defining a first order of processing for the first selected set of available cartridges corresponding to the sequence of access indicated by the user;

(f) recording the definition of the first selected set and the corresponding first order of processing;

(g) recalling the recorded definition of the selected set and the corresponding order of processing;

(h) in response to, and in accordance with, the recalled definition of the selected set and the corresponding order of processing, loading a first one of the selected set of storage cartridges into the shared cartridge drive;

(i) backing up a predefined block of data from the primary storage system to the first loaded cartridge until a predefined maximum storage capacity of the first loaded cartridge is reached or an end of the block of data is reached;

(j) if the predefined block of data is not fully backed up by the above backup step (i) and there are additional cartridges in the recalled definition of the selected set, loading a next cartridge of the selected set of storage cartridges into the shared cartridge drive in response to, and in accordance with, the recalled definition of the selected set and the corresponding order of processing; and

(k) if the predefined block of data is not full backed up by the above backup steps (i) and (j), repeating above backup step (j) until backup is completed or until there are no more cartridges in the recalled selected set, whichever occurs first.

14. The method as in claim 13, further comprising the steps of:

assigning a first name to the definition of the first selected set and the corresponding first order of processing;

using the assigned first name in said step (f) of recording the definition of the first selected set and the corresponding first order of processing; and

using the assigned first name in said step (g) of recalling the recorded definition of the selected set and the corresponding order of processing.

16. A data transfer system comprising:

(a) primary data storage means for storing digital data;

(b) automated element handling means, operatively coupled to the primary data storage means for effectuating data transfer therewith, the element handling means having one or more shared media element drives into each of which is loadable, one at a time, a plurality of physically discrete, interchangeable, data storage media elements, and the element handling means further having one or more media element changers, operatively engageable with corresponding ones of the one or more shared media element drives and with available ones of the data storage media elements, for loading respective ones of the available storage media elements into operative engagement with the one or more shared media element drives, and for unloading loaded ones of the storage media elements from the corresponding one or more shared media element drives;

(c) media element selection means, operatively coupled to the one or more automated element handling means, for controlling the load and unload operations of the corresponding one or more media element changers,

said media element selection means including snapshot means for maintaining a current status indication of the number of media element drives available for effectuating data transfer, and of the number of storage media elements available for data transfer, including all storage media elements currently loaded in the media element drives; and

(d) configuration selection means, operatively coupled to the media element selection means, for;

(d.1) displaying to a user, a representation of a set of pre-identified media elements that are each at least physically available by virtue of being either already loaded into the one or more shared media element drives or being available for automatic loading into the one or more media element drives by said one or more media element changers, said pre-identification of the physically available media elements being derived from the current status indication maintained by the media element selection means,

(d.2) enabling the user to select one or more of the pre-identified media elements from the displayed set,

(d.3) defining all or a subset of the pre-identified media elements as a first user-selected set in accordance with the selection made by the user from the displayed set of pre-identified media elements, and

(d.4) in response to the definition of the user-selected set, outputting control signals to the one or more automated element handling means, to control the one or more media element changers so as to load, where necessary, one or more of the media elements of the corresponding user-selected set into operative engagement with the one or more shared media element drives such that automated data transfer can take place between the loaded one or more of the media elements of the corresponding user-selected set and the primary data storage means.

17. A data transfer system according to claim 16 further comprising:

(e) configuration management means, operatively coupled to the configuration selection means and to the media element selection means, for recording the definition of the user-selected set and for subsequently recalling the user-selected set for output as said control signals to the one or more automated element handling means.

18. A data transfer system according to claim 17 wherein the configuration selection means includes means for:

(d.5) in the case where the user selects at least two media elements from the displayed set of pre-identified available media elements, enabling the user to indicate a sequence for the two or more of the pre-identified media elements selected from the displayed set;

(d.6) defining the sequence indicated by the user as a first order of processing for the corresponding user-selected set of pre-identified available media elements; and

(d.7) including in said control signals output to the one or more automated element handling means, the user-indicated order of processing such that in response to the control signals, the one or more automated element handling means load the media elements of the user-selected set, as necessary, and cause the one or more shared media element drives to operate such that data is sequentially transferred between the primary data storage system and one or more media elements of the corresponding user-selected set in accordance with the correspondingly defined order of processing.

19. A data transfer system according to claim 18 wherein said configuration management means includes

(e.1) means for recording the definition of the user-indicated order of processing and for subsequently recalling the user-indicated order of processing for output as part of said control signals to the one or more automated element handling means.

20. A data transfer system according to claim 16 wherein said automated element handling means has at least two media changers.

21. A data transfer system according to claim 16 wherein said automated element handling means has at least two shared media element drives.

22. A data transfer system according to claim 21 wherein said at least two shared media element drives are operatively coupled to one another by a SCSI bus.

23. A data transfer system according to claim 22 wherein said automated element handling means has at least two media changers operatively coupled to and controlled over said SCSI bus.

24. A data transfer system according to claim 16 wherein said automated element handling means is operatively coupled to the primary data storage means by a SCSI bus and the one or more media element changers are controlled over said SCSI bus.

25. A data transfer system according to claim 16 wherein said primary data storage means is part of a file server that is operatively coupled to a data exchange network.

26. A data transfer system according to claim 16 wherein said configuration selection means includes means for pre-identifying media elements as not only being physically available but also as being logically available by virtue of being pre-assigned exclusively to a corresponding user or to a corresponding user group or to a corresponding automated task.

27. A data transfer system according to claim 26 wherein said configuration selection means includes means for displaying to a user, a representation of a set of pre-identified media elements that are each logically available to the user by virtue of the user belonging to a corresponding user group.

28. A data transfer system according to claim 16 wherein said configuration selection means includes means for displaying to a user, a representation of a set of pre-identified media elements that are each logically available to the user by virtue of the media elements having empty storage space into which data may be stored.