WO2014055034A1 - Apparatus for storing data storage media - Google Patents

Apparatus for storing data storage media Download PDF

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Publication number
WO2014055034A1
WO2014055034A1 PCT/SG2012/000368 SG2012000368W WO2014055034A1 WO 2014055034 A1 WO2014055034 A1 WO 2014055034A1 SG 2012000368 W SG2012000368 W SG 2012000368W WO 2014055034 A1 WO2014055034 A1 WO 2014055034A1
Authority
WO
WIPO (PCT)
Prior art keywords
data storage
library
storage library
modules
module
Prior art date
Application number
PCT/SG2012/000368
Other languages
French (fr)
Inventor
Hongli BAI
Kan YANG
Chin Ting Tan
Kok Hwa LIEW
Ming Lee TAY
Original Assignee
Venture Corporation Limited
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Venture Corporation Limited filed Critical Venture Corporation Limited
Priority to PCT/SG2012/000368 priority Critical patent/WO2014055034A1/en
Publication of WO2014055034A1 publication Critical patent/WO2014055034A1/en

Links

Classifications

    • G—PHYSICS
    • G11—INFORMATION STORAGE
    • G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
    • G11B15/00—Driving, starting or stopping record carriers of filamentary or web form; Driving both such record carriers and heads; Guiding such record carriers or containers therefor; Control thereof; Control of operating function
    • G11B15/675—Guiding containers, e.g. loading, ejecting cassettes
    • G11B15/68—Automatic cassette changing arrangements; automatic tape changing arrangements
    • G11B15/689—Control of the cassette changing arrangement
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0602—Interfaces specially adapted for storage systems specifically adapted to achieve a particular effect
    • G06F3/0604—Improving or facilitating administration, e.g. storage management
    • G06F3/0607—Improving or facilitating administration, e.g. storage management by facilitating the process of upgrading existing storage systems, e.g. for improving compatibility between host and storage device
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0628—Interfaces specially adapted for storage systems making use of a particular technique
    • G06F3/0629—Configuration or reconfiguration of storage systems
    • G—PHYSICS
    • G06—COMPUTING; CALCULATING OR COUNTING
    • G06F—ELECTRIC DIGITAL DATA PROCESSING
    • G06F3/00—Input arrangements for transferring data to be processed into a form capable of being handled by the computer; Output arrangements for transferring data from processing unit to output unit, e.g. interface arrangements
    • G06F3/06—Digital input from, or digital output to, record carriers, e.g. RAID, emulated record carriers or networked record carriers
    • G06F3/0601—Interfaces specially adapted for storage systems
    • G06F3/0668—Interfaces specially adapted for storage systems adopting a particular infrastructure
    • G06F3/0671—In-line storage system
    • G06F3/0683—Plurality of storage devices
    • G06F3/0686—Libraries, e.g. tape libraries, jukebox

Definitions

  • This invention relates to an apparatus for storing data storage media, and in particular, although not exclusively, to data storage libraries for tape cartridges.
  • Data storage libraries currently come in a few forms, such as unitary data storage libraries or scalable data storage libraries.
  • a unitary data storage library typically comprises a set of storage slots for storing data storage media therein, and at least one read/write drive for accessing contents of the data storage media.
  • a scalable data storage library typically comprises a base module that is similar to the unitary data storage library, as well as a number of expansion modules each having its own set of storage slots for increasing the number of data storage media that can be stored in the library. Appreciably, the scalable data storage library would contain several times more slots than the unitary data storage library.
  • Each data storage library whether unitary or scalable, typically has a library controller for directing the transport of data storage media to and from the storage slots in the library via a robotic cartridge handler.
  • a common example of data storage media includes tape cartridges.
  • the library controller 12 is provided in the base module 14 which therefore carries the capabilities of read/write drive control, robotic control, library management and user interface control including a control panel and web server.
  • the expansion modules 16 are connected to the base module 14 for read/write drive communication and sensor signal capture.
  • the expansion modules 16 work in conjunction with the base module 14 and cannot operate without it 14. Because the library controller 12 has limited resources, the number of expansion modules 16 that can be provided is capped to only a few.
  • a number of unitary data storage libraries 20 may each be connected to a host 30 as shown in FIG. 2 (prior art).
  • the host 30 manages each unitary data storage library 20 individually with each unitary data storage library 20 operating as a stand-alone data storage library unit.
  • the host 30 is thus configured to have a number of partitions at least corresponding to the number of unitary data storage libraries 20 being managed. In such a configuration, the minimum number of partitions is fixed and cannot be further customized by grouping or categorizing according to user requirements easier management.
  • an apparatus for storing data storage media comprising: a plurality of data storage library modules, each data storage library module comprising a library controller and a plurality of storage slots, the plurality of library controllers being interconnected and configured to allow distributed software to control and manage the plurality of data storage library modules as a single data storage library.
  • Each data storage library module may be one of: a unitary data storage library, a base module of a scalable data storage library, and an expansion module of a scalable data storage library.
  • the plurality of data storage library modules may be configured to report to a host as a single library configurable to comprise a number of partitions via distributed software provided in the data storage library modules.
  • Each library controller may be configured to manage application modules configured for controlling various components associated which its respective data storage library module.
  • the plurality of library controllers may be interchangeable between the plurality of data storage library modules.
  • the plurality of library controllers may be interconnected in parallel and function as a group.
  • the plurality of library controllers may run identical software that is configurable.
  • the apparatus may be configured to allow addition of further data storage library modules to the plurality of data storage library modules by interconnecting their library controllers to the plurality of library controllers.
  • the apparatus may be configured to automatically detect addition of a further data storage library module to the plurality of data storage library modules.
  • the apparatus may be configured to automatically detect removal of a data storage library module from the plurality of data storage library modules.
  • FIG. 1 (prior art) is a schematic architectural diagram of a scalable data storage library
  • FIG. 2 (prior art) is a schematic architectural diagram of a number of unitary data
  • FIG. 3 is a schematic architectural diagram of an apparatus for storing data storage media
  • FIG. 4 is a schematic architectural diagram of the apparatus of FIG. 1 applied to a scalable data storage library
  • FIG. 5 is a schematic architectural diagram of the apparatus of FIG. 1 applied to a number of unitary data storage libraries.
  • FIG. 6 is a schematic architectural diagram of the apparatus of FIG. 1 applied to a scalable libraries and a number of unitary data storage libraries;
  • FIG. 7 is a schematic software architectural diagram for the apparatus of FIG. 1. DETAILED DESCRIPTION OF THE EMBODIMENT
  • the apparatus 100 comprises a plurality of data storage library modules 50.
  • Each data storage library module 50 comprises a library controller 60 and a plurality of storage slots (not shown).
  • the plurality of library controllers 60 are interconnected to allow distributed control of read/write drives 66 and robotic cartridge handlers (not shown) in the plurality of data storage library modules 50.
  • Each data storage library module 50 may be a unitary data storage library, a base module of a scalable data storage library or an expansion module of a scalable data storage library having its own library controller.
  • a number of read/write drives 66 are provided in each data storage library module 50 for accessing the contents of each data storage medium in the data storage library module 50.
  • the data storage library modules 50 of the apparatus 100 comprise a base module 54 and a number of expansion modules 56.
  • the base module 54 and expansion modules 56 each have a library controller 60. All the library controllers 60 are interconnected such that distributed library control is achieved to provide distributed control of read write drives, robotic cartridge handlers, user interfaces as well as distributed management of the scalable library 102.
  • the expansion modules 56 are not dependent on the base module 54 in order to function, due to the interconnected multiple library controllers 60, and, unlike prior art scalable libraries, the expansion modules 56 can continue to function without the base module 54 in case of damage or malfunction of the base module 54.
  • the base module 54 also no longer needs to be positioned at only the top or bottom of the scalable data storage library 102.
  • the data storage library modules 50 of the apparatus 100 comprise unitary data storage libraries 58 having their individual library controllers 60 interconnected, for example via a local area network 80.
  • Each unitary data storage library 58 is individually connected to a host 70.
  • the plurality of data storage library modules 50 report to the host 70 and are managed as a single library by a distributed software provided in the library controllers 60 that belong to each of the data storage library modules 50.
  • the unitary data storage library 58 can be configured to comprise only one partition or any suitable number of partitions according to how the user wishes to manage the apparatus 100.
  • the partitions may be grouped by category.
  • the host 70 is typically also configured as a backup server for backing up and restoring data back to the data storage media via the read/write drives 66 in order to prevent the loss of data.
  • the apparatus 100 may comprise any number of unitary data storage libraries 58 and scalable libraries 102 as shown in FIG. 6.
  • the plurality of data storage library modules 50 of the apparatus 100 comprise unitary data storage libraries 58 and base modules 54 and expansion modules 56 of scalable libraries 102.
  • Each of the data storage library modules 50 have a library controller 60 that is interconnected with all the other library controllers 60 in the apparatus 100.
  • the apparatus 100 is thus configured to be managed as a single library via the distributed software provided in the library controllers 60 that belong to each of data storage library modules 50.
  • each library controller 60 has a distributed software configured to manage application modules configured for controlling various components associated which its respective data storage library module 50.
  • the application modules may include a robotic control module 62 for controlling one or more robotic cartridge handlers, a read/write drive control module 64 for controlling one or more read write drives 66, an operating system module 68 for interacting with a local operating system, a sensors module for controlling various sensors in the data storage library module 50 and so on.
  • Distributed applications 67 provide synchronization data and manage service, while middleware services 69 provide a communication service between the library controllers 60.
  • the plurality of library controllers 60 run an identical software that is configurable according to different situational requirements.
  • the plurality of library controllers 60 is also preferably configured to be interchangeable between the plurality of data storage library modules 50.
  • the apparatus 100 is configured to allow for addition of further data storage library modules to the plurality of data storage library modules 50 by interconnecting their library controllers to the plurality of library controllers 60, so that there is no hardware limitation to the number of expansion modules 56 or unitary data storage libraries 58 that can be provided in the apparatus 100.
  • the apparatus 100 is configured to automatically detect addition of a further data storage library module to the plurality of data storage library modules 50, and/or detect the removal of a data storage library module from the plurality of data storage library modules 50.
  • the apparatus 100 can be controlled as a single data storage library, able to support multiple robotic cartridge handlers, multiple control panels and multiple web servers.
  • Any redundant robotic cartridge handlers may serve as backups in case of other failures.
  • a vote scheme may be implemented to provide an optimized assignment of tasks to various resources in the apparatus 100.
  • Any redundant module 50 can take over tasks of failed modules 50.
  • a flexible combination of sequences can be created, allowing detection and recovery from error to be made as soon as possible. It should be appreciated that the invention has been described by way of example only and that various modifications in design and/or detail may be made without departing from the spirit or scope of this invention.
  • the data storage media may be storage discs or any other data storage media suitable for reliable, long term and readily retrievable data storage.

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  • Engineering & Computer Science (AREA)
  • Theoretical Computer Science (AREA)
  • Human Computer Interaction (AREA)
  • Physics & Mathematics (AREA)
  • General Engineering & Computer Science (AREA)
  • General Physics & Mathematics (AREA)
  • Library & Information Science (AREA)
  • Automatic Disk Changers (AREA)

Abstract

An apparatus for storing data storage media, the apparatus comprising: a plurality of data storage library modules, each data storage library module comprising a library controller and a plurality of storage slots, the plurality of library controllers being interconnected and configured to allow distributed software to control and manage the plurality of data storage library modules as a single data storage library.

Description

APPARATUS FOR STORING DATA STORAGE MEDIA TECHNICAL FIELD
This invention relates to an apparatus for storing data storage media, and in particular, although not exclusively, to data storage libraries for tape cartridges.
BACKGROUND
Data storage libraries currently come in a few forms, such as unitary data storage libraries or scalable data storage libraries. A unitary data storage library typically comprises a set of storage slots for storing data storage media therein, and at least one read/write drive for accessing contents of the data storage media. A scalable data storage library typically comprises a base module that is similar to the unitary data storage library, as well as a number of expansion modules each having its own set of storage slots for increasing the number of data storage media that can be stored in the library. Appreciably, the scalable data storage library would contain several times more slots than the unitary data storage library. Each data storage library, whether unitary or scalable, typically has a library controller for directing the transport of data storage media to and from the storage slots in the library via a robotic cartridge handler. A common example of data storage media includes tape cartridges.
In the scalable data storage library 10, as shown in FIG. 1 (prior art), the library controller 12 is provided in the base module 14 which therefore carries the capabilities of read/write drive control, robotic control, library management and user interface control including a control panel and web server. The expansion modules 16 are connected to the base module 14 for read/write drive communication and sensor signal capture. The expansion modules 16 work in conjunction with the base module 14 and cannot operate without it 14. Because the library controller 12 has limited resources, the number of expansion modules 16 that can be provided is capped to only a few.
In some configurations, a number of unitary data storage libraries 20 may each be connected to a host 30 as shown in FIG. 2 (prior art). The host 30 manages each unitary data storage library 20 individually with each unitary data storage library 20 operating as a stand-alone data storage library unit. The host 30 is thus configured to have a number of partitions at least corresponding to the number of unitary data storage libraries 20 being managed. In such a configuration, the minimum number of partitions is fixed and cannot be further customized by grouping or categorizing according to user requirements easier management. SUMMARY
According to a first exemplary aspect, there is provided an apparatus for storing data storage media, the apparatus comprising: a plurality of data storage library modules, each data storage library module comprising a library controller and a plurality of storage slots, the plurality of library controllers being interconnected and configured to allow distributed software to control and manage the plurality of data storage library modules as a single data storage library. Each data storage library module may be one of: a unitary data storage library, a base module of a scalable data storage library, and an expansion module of a scalable data storage library. The plurality of data storage library modules may be configured to report to a host as a single library configurable to comprise a number of partitions via distributed software provided in the data storage library modules.
Each library controller may be configured to manage application modules configured for controlling various components associated which its respective data storage library module.
The plurality of library controllers may be interchangeable between the plurality of data storage library modules.
The plurality of library controllers may be interconnected in parallel and function as a group.
The plurality of library controllers may run identical software that is configurable.
The apparatus may be configured to allow addition of further data storage library modules to the plurality of data storage library modules by interconnecting their library controllers to the plurality of library controllers. The apparatus may be configured to automatically detect addition of a further data storage library module to the plurality of data storage library modules.
The apparatus may be configured to automatically detect removal of a data storage library module from the plurality of data storage library modules.
BRIEF DESCRIPTION OF THE DRAWINGS
In order that the invention may be fully understood and readily put into practical effect there shall now be described by way of non-limitative example only exemplary embodiments, the description being with reference to the accompanying illustrative drawings.
In the drawings:
FIG. 1 (prior art) is a schematic architectural diagram of a scalable data storage library; FIG. 2 (prior art) is a schematic architectural diagram of a number of unitary data
storage libraries connected to a host;
FIG. 3 is a schematic architectural diagram of an apparatus for storing data storage media;
FIG. 4 is a schematic architectural diagram of the apparatus of FIG. 1 applied to a scalable data storage library;
FIG. 5 is a schematic architectural diagram of the apparatus of FIG. 1 applied to a number of unitary data storage libraries; and
FIG. 6 is a schematic architectural diagram of the apparatus of FIG. 1 applied to a scalable libraries and a number of unitary data storage libraries; and
FIG. 7 is a schematic software architectural diagram for the apparatus of FIG. 1. DETAILED DESCRIPTION OF THE EMBODIMENT
An apparatus 100 for storing data storage media will be described below with reference to FIGS. 3 to 8.
As shown in FIG. 3, the apparatus 100 comprises a plurality of data storage library modules 50. Each data storage library module 50 comprises a library controller 60 and a plurality of storage slots (not shown). The plurality of library controllers 60 are interconnected to allow distributed control of read/write drives 66 and robotic cartridge handlers (not shown) in the plurality of data storage library modules 50.
The plurality of library controllers 60 are preferably interconnected in parallel and function as a group. Each data storage library module 50 may be a unitary data storage library, a base module of a scalable data storage library or an expansion module of a scalable data storage library having its own library controller. A number of read/write drives 66 are provided in each data storage library module 50 for accessing the contents of each data storage medium in the data storage library module 50.
In one embodiment, where applied to a scalable library 102 as shown in FIG. 4, the data storage library modules 50 of the apparatus 100 comprise a base module 54 and a number of expansion modules 56. The base module 54 and expansion modules 56 each have a library controller 60. All the library controllers 60 are interconnected such that distributed library control is achieved to provide distributed control of read write drives, robotic cartridge handlers, user interfaces as well as distributed management of the scalable library 102. In this way, the expansion modules 56 are not dependent on the base module 54 in order to function, due to the interconnected multiple library controllers 60, and, unlike prior art scalable libraries, the expansion modules 56 can continue to function without the base module 54 in case of damage or malfunction of the base module 54. The base module 54 also no longer needs to be positioned at only the top or bottom of the scalable data storage library 102. In another embodiment, where applied to a number of unitary data storage libraries 58 as shown in FIG. 5, the data storage library modules 50 of the apparatus 100 comprise unitary data storage libraries 58 having their individual library controllers 60 interconnected, for example via a local area network 80. Each unitary data storage library 58 is individually connected to a host 70. The plurality of data storage library modules 50 report to the host 70 and are managed as a single library by a distributed software provided in the library controllers 60 that belong to each of the data storage library modules 50. In this way, the unitary data storage library 58 can be configured to comprise only one partition or any suitable number of partitions according to how the user wishes to manage the apparatus 100. For example, the partitions may be grouped by category. The host 70 is typically also configured as a backup server for backing up and restoring data back to the data storage media via the read/write drives 66 in order to prevent the loss of data. In a further embodiment, the apparatus 100 may comprise any number of unitary data storage libraries 58 and scalable libraries 102 as shown in FIG. 6. In this configuration, the plurality of data storage library modules 50 of the apparatus 100 comprise unitary data storage libraries 58 and base modules 54 and expansion modules 56 of scalable libraries 102. Each of the data storage library modules 50 have a library controller 60 that is interconnected with all the other library controllers 60 in the apparatus 100. The apparatus 100 is thus configured to be managed as a single library via the distributed software provided in the library controllers 60 that belong to each of data storage library modules 50.
As shown in FIG. 7, each library controller 60 has a distributed software configured to manage application modules configured for controlling various components associated which its respective data storage library module 50. The application modules may include a robotic control module 62 for controlling one or more robotic cartridge handlers, a read/write drive control module 64 for controlling one or more read write drives 66, an operating system module 68 for interacting with a local operating system, a sensors module for controlling various sensors in the data storage library module 50 and so on. Distributed applications 67 provide synchronization data and manage service, while middleware services 69 provide a communication service between the library controllers 60.
Preferably, the plurality of library controllers 60 run an identical software that is configurable according to different situational requirements. The plurality of library controllers 60 is also preferably configured to be interchangeable between the plurality of data storage library modules 50.
It is envisaged that the apparatus 100 is configured to allow for addition of further data storage library modules to the plurality of data storage library modules 50 by interconnecting their library controllers to the plurality of library controllers 60, so that there is no hardware limitation to the number of expansion modules 56 or unitary data storage libraries 58 that can be provided in the apparatus 100. Preferably, the apparatus 100 is configured to automatically detect addition of a further data storage library module to the plurality of data storage library modules 50, and/or detect the removal of a data storage library module from the plurality of data storage library modules 50. Advantageously, arising from its features as described above, the apparatus 100 can be controlled as a single data storage library, able to support multiple robotic cartridge handlers, multiple control panels and multiple web servers. Any redundant robotic cartridge handlers may serve as backups in case of other failures. A vote scheme may be implemented to provide an optimized assignment of tasks to various resources in the apparatus 100. Any redundant module 50 can take over tasks of failed modules 50. A flexible combination of sequences can be created, allowing detection and recovery from error to be made as soon as possible. It should be appreciated that the invention has been described by way of example only and that various modifications in design and/or detail may be made without departing from the spirit or scope of this invention. For example, besides tape cartridges, the data storage media may be storage discs or any other data storage media suitable for reliable, long term and readily retrievable data storage.

Claims

Claims
1. An apparatus for storing data storage media, the apparatus comprising:
a plurality of data storage library modules, each data storage library module comprising a library controller and a plurality of storage slots,
the plurality of library controllers being interconnected and configured to allow distributed software to control and manage the plurality of data storage library modules as a single data storage library.
The apparatus of claim 1, wherein each data storage library module is one of: a unitary data storage library, a base module of a scalable data storage library, and an expansion module of a scalable data storage library.
The apparatus of claim 3, wherein the plurality of data storage library modules are configured to report to a host as a single library configurable to comprise a number of partitions via distributed software provided in the data storage library modules.
The apparatus of claim any preceding claim, wherein each library controller is configured to manage application modules configured for controlling various components associated which its respective data storage library module.
5. The apparatus of any preceding claim, wherein the plurality of library controllers are interchangeable between the plurality of data storage library modules. The apparatus of any preceding claim, wherein the plurality of library controllers are interconnected in parallel and function as a group.
The apparatus of any preceding claim, wherein the plurality of library controllers run identical software that is configurable.
The apparatus of any preceding claim, wherein the apparatus is configured to allow addition of further data storage library modules to the plurality of data storage library modules by interconnecting their library controllers to the plurality of library controllers.
The apparatus of any preceding claim, wherein the apparatus is configured to automatically detect addition of a further data storage library module to the plurality of data storage library modules.
The apparatus of any preceding claim, wherein the apparatus is configured to automatically detect removal of a data storage library module from the plurality of data storage library modules.
PCT/SG2012/000368 2012-10-02 2012-10-02 Apparatus for storing data storage media WO2014055034A1 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PCT/SG2012/000368 WO2014055034A1 (en) 2012-10-02 2012-10-02 Apparatus for storing data storage media

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Publications (1)

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Country Status (1)

Country Link
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Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
"STORAGETEK SL8500 MODULAR LIBRARY SYSTEM", 15 April 2011 (2011-04-15), Retrieved from the Internet <URL:http://web.archive.orglweb/20110415234020/http://www.oracle.comlus/products/servers-storage/storage/tape-storage/034341.pdf> [retrieved on 20121119] *

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