Archiving device and data file server using data file recorded in division over recording media

• US 5,832,523 A
• Filed: 08/30/1996
• Issued: 11/03/1998
• Est. Priority Date: 08/30/1995
• Status: Expired due to Fees

• Current Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Original Assignee: Kabushiki Kaisha Toshiba (Toshiba Corporation)
• Inventors: Kanai, Tatsunori, Maeda, Seiji, Yao, Hiroshi, Kizu, Toshiki
• Primary Examiner(s): Black, Thomas G.
• Assistant Examiner(s): Ho, Ruay Lian
• Application Number:
  US08/706,334
• Time in Patent Office: 795 Days
• Field of Search: 395/601, 395/611, 395/616, 395/617, 395/618, 395/619, 395/620, 395/621, 395/622, 395/326, 395/329, 395/441, 395/182.01, 395/182.04, 395/182.13, 707/1, 707/50, 707/100, 707/5, 707/104, 707/200, 707/206
• US Class Current: 1/1
• CPC Class Codes: G06F 3/0608 Saving storage space on storage systems
• CPC Class Codes: G06F 3/0611 in relation to response time
• CPC Class Codes: G06F 3/0634 by changing the state or mode of one or more devices
• CPC Class Codes: G06F 3/0686 Libraries, e.g. tape libraries, jukebox
• CPC Class Codes: G11B 15/68 Automatic cassette changing arrangements; automatic tape changing arrangements
• CPC Class Codes: G11B 17/22 from random access magazine of disc records
• CPC Class Codes: Y10S 707/99955 Archiving or backup

Abstract

An archiving device with a plurality of drive devices for reading out a plurality of data constituting one data file from a plurality of removable recording media in parallel. A recording media loading/unloading device selectively loads/unloads the removable recording media to/from the drive devices. A control device controls the media loading/unloading operations by the recording media loading/unloading device and data reading operations by the drive devices according to a reading request for a desired data file so as to selectively use the drive devices in reading the desired data file from the removable recording media.

Claims

1. An archiving device, comprising:

a plurality of drive devices for reading out a plurality of data constituting one data file from a plurality of removable recording media in parallel;

a recording media loading/unloading device for selectively loading/unloading the removable recording media to/from said plurality of drive devices; and

control means for controlling media loading/unloading operations by the recording media loading/unloading device and data reading operations by the drive devices according to a reading request for a desired data file to selectively use said plurality of drive devices in reading the desired data file from said plurality of removable recording media.

2. The archiving device of claim 1, wherein each removable recording medium records data obtained by dividing said one data file.

3. The archiving device of claim 2, wherein said plurality of removable recording media record said one data file by using a striping technique.

4. The archiving device of claim 1, wherein each removable recording medium mixedly records a plurality of data belonging to different data files, each data being a part of a corresponding data file obtained by dividing the corresponding data file into parts.

5. The archiving device of claim 4, wherein said plurality of removable recording media record said plurality of data files such that top data of different data files are recorded in different removable recording media.

6. The archiving device of claim 1, wherein said plurality of removable recording media record identical data constituting said one data file.

7. The archiving device of claim 1, wherein the control means changes a number of drive devices allocated to a reading of each data file according to a priority level set to a reading request for each data file.

8. The archiving device of claim 1, wherein said plurality of removable recording media include more than one data recording removable recording media which record the data constituting said one data file, and at least one parity recording removable recording medium which records a parity among the data recorded in the data recording removable recording media, and the archiving device further comprises:

data recovery means for recovering data recorded in one of the data recording removable recording media which is disabled, by using data recorded in remaining ones of the data recording removable recording media and the parity recorded in the parity recording removable recording medium.

9. The archiving device of claim 8, wherein said plurality of drive devices read out data recorded in remaining ones of the data recording removable recording media and the parity recorded in the parity recording removable recording medium in parallel.

10. The archiving device of claim 8, wherein the control means increases a number of drive devices allocated to a reading of said one data file when one of the data recording removable recording media is disabled.

11. The archiving device of claim 10, wherein the control means increases a number of drive devices by raising a priority level set for a reading request for said one data file.

12. The archiving device of claim 8, further comprising:

means for writing data recovered by the data recovery means into a new removable recording medium.

13. A data file server, comprising:

a plurality of memory devices for storing data files;

transfer means for reading out a desired data file from the memory devices and transferring the read out desired data file to a request source according to a reading request for the desired data file given from the request source;

a plurality of drive devices capable of reading out a plurality of data constituting one data file from a plurality of removable recording media in parallel;

a recording media loading/unloading device for selectively loading/unloading the removable recording media to/from said plurality of drive devices;

control means for controlling media loading/unloading operations by the recording media loading/unloading device and data reading operations by the drive devices according to a reading request for a desired data file to selectively use said plurality of drive devices in reading the desired data file from said plurality of removable recording media; and

writing means for writing more than one data read out by more than one of the drive devices in parallel, into the memory devices.

14. The data file server of claim 13, wherein said plurality of memory devices store said one data file in division over said plurality of memory devices, and said plurality of removable recording media record said one data file in division over said plurality of removable recording media in an identical order as said plurality of memory devices.

15. The data file server of claim 13, wherein said plurality of memory devices store said one data file in division over said plurality of memory devices in a first order, and said plurality of removable recording media record said one data file in division over said plurality of removable recording media in a second order different from the first order.

16. The data file server of claim 13, wherein at least one of the memory devices is connected with at least one corresponding drive device through an independent data transfer path.

17. The data file server of claim 16, wherein when a plurality of data constituting one data file are to be transferred from the removable recording media to the memory devices, said at least one drive device reads out a necessary portion of said one data file for corresponding memory device from one removable recording medium, and the writing means writes the necessary portion read out by said at least one drive device into corresponding memory device through the independent data transfer path.

18. The data file server of claim 16, wherein when data for one memory device is to be transferred from one removable recording medium to said one memory device, said at least one drive device connected with said one memory device reads out said data from said one removable recording medium, and the writing means writes said data read out by said at least one drive device into said one memory device through the independent data transfer path.

19. The data file server of claim 13, wherein said plurality of memory devices store said one data file in division over said plurality of memory devices, and when data stored in one of the memory devices is to be recovered, one of the drive devices reads out a necessary portion of said one data file from one removable recording medium, and the writing means writes the necessary portion read out by said one of the drive devices into said one of the memory devices.