DATA DOUBLING DEVICE

Title:

DATA DOUBLING DEVICE

Document Type and Number:

Japanese Patent JPH09231139

Kind Code:

A

Abstract:

To reduce the cost for data doubling by making it possible to use a sequential access medium like the tape drive.

When the system is actuated, a file system management part 103-1 generates a file management table 110-1 and a doubling process part 103-2 generates a doubling management table 110-2. When an application program 101 closes a file, the file system management part 103-1 resets the corresponding flag of the file management table 110-1 and when the file is updated, the corresponding flag is set. Further, the flag of the corresponding entry in the doubling management table 110-2 is also set. The doubling process part 103-2 generates a new entry at the tail when the flag of the doubling management table 110-2 is set and transfers the file image corresponding to the corresponding entry from a magnetic disk drive 104 to the magnetic tape drive 112.

More Like This:

JP3792989	DATA BACKUP SYSTEM
JPS57162196	DESTRUCTION PREVENTING SYSTEM FOR DATA STORING AREA
JP3977549	Content management method, content usage management system, content usage management device and playback device

Inventors:

KATO MASAYUKI

Application Number:

JP3979696A

Publication Date:

September 05, 1997

Filing Date:

February 27, 1996

Export Citation:

Click for automatic bibliography generation Help

Assignee:

NEC CORP

International Classes:

G06F12/16; G06F12/00; (IPC1-7): G06F12/16; G06F12/00

Attorney, Agent or Firm:

Naoki Kyomoto (2 outside)

Previous Patent: ELECTRONIC PART PROVIDED WITH SYNCHRONOUS MEMORY

Next Patent: MEMORY CHECK DEVICE