DATA STORING APPARATUS, AND DATA STORING METHOD

• US 20160210071A1
• Filed: 03/25/2016
• Published: 07/21/2016
• Est. Priority Date: 10/28/2013
• Status: Abandoned Application

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: KAWAHARA, Mari, NAKADA, Shigeki, UMEMOTO, Yasutaka
• Application Number:
  US15/081,159
• Publication Number:
  US 20160210071A1
• Time in Patent Office: Days
• US Class Current: 1/1
• CPC Class Codes: G06F 12/16 Protection against loss of memory contents contains no material, see G06F11/00
• CPC Class Codes: G06F 3/0623 in relation to content
• CPC Class Codes: G06F 3/064 Management of blocks
• CPC Class Codes: G06F 3/0653 Monitoring storage devices or systems
• CPC Class Codes: G06F 3/0673 Single storage device
• CPC Class Codes: H04N 21/4335 Housekeeping operations, e.g. prioritizing content for deletion because of storage space restrictions storage management, e.g. defragmentation G06F3/0604; unloading stored programs G06F9/445; storage management in file systems G06F16/10; buffering arrangements in a network node or in an end terminal in packet networks H04L49/90
• CPC Class Codes: H04N 5/77 between a recording apparatus and a television camera

Abstract

A data storage apparatus includes a processor that executes a process. the process includes: storing data sequentially input by sequentially repeating overwriting in blocks not determined as protection targets among a plurality of blocks in a storage area of a storage unit, each block having an upper limit in number of data rewrites; registering, upon detection of a protection trigger for giving an instruction to protect data, protection information for giving an instruction to protect data and block information indicating a block that stores data obtained a predetermined time before the detection of the protection trigger, in stored data; and managing, as blocks to be protected, blocks from the block that stores the data obtained the predetermined time before the detection to a block that stores data upon detection of a termination trigger for giving an instruction to terminate protection.

Claims

1. A data storage apparatus comprising:

a processor that executes a process, the process comprising;

storing data sequentially input by sequentially repeating overwriting in blocks not determined as protection targets among a plurality of blocks in a storage area of a storage unit, each block having an upper limit in number of data rewrites;

registering, upon detection of a protection trigger for giving an instruction to protect data, protection information for giving an instruction to protect data and block information indicating a block that stores data obtained a predetermined time before the detection of the protection trigger, in stored data; and

managing, as blocks to be protected, blocks from the block that stores the data obtained the predetermined time before the detection to a block that stores data upon detection of a termination trigger for giving an instruction to terminate protection.

2. The data storage apparatus according to claim 1, the process further comprising:

updating, when an instruction to release protection of data is provided, the protection information on a block that has stored the protection information to a released state.

3. The data storage apparatus according to claim 2, wherein the updating stores, in a memory, data to be stored in a block by the storing unit upon detection of the protection trigger, and when the instruction to release protection is provided, the updating updates the protection information on the data stored in the memory to a released state, and overwrites data in the block that has stored the protection information with the updated data.

4. A data storage method comprising:

storing, by a computer, data sequentially input by sequentially repeating overwriting in blocks not determined as protection targets among a plurality of blocks in a storage area of a storage unit, each block having an upper limit in number of data rewrites;

registering, by the computer, upon detection of a protection trigger for giving an instruction to protect data, protection information for giving an instruction to protect data and block information indicating a block that stores data obtained a predetermined time before the detection of the protection trigger, in stored data; and

managing, by the computer, as blocks to be protected, blocks from the block that stores the data obtained the predetermined time before the detection to a block that stores data upon detection of a termination trigger for giving an instruction to terminate protection.

5. The data storage method according to claim 4, further comprising:

updating, by the computer, when an instruction to release protection of data is provided, the protection information on a block that has stored the protection information to a released state.

6. The data storage method according to claim 5, wherein the updating stores, in a memory, data to be stored in a block by the storing unit upon detection of the protection trigger, and when the instruction to release protection is provided, the updating updates the protection information on the data stored in the memory to a released state, and overwrites data in the block that has stored the protection information with the updated data.

7. A non-transitory computer-readable recording medium having stored therein a data storage program that causes a computer to execute a process comprising:

storing data sequentially input by sequentially repeating overwriting in blocks not determined as protection targets among a plurality of blocks in a storage area of a storage unit, each block having an upper limit in number of data rewrites;

registering, upon detection of a protection trigger for giving an instruction to protect data, protection information for giving an instruction to protect data and block information indicating a block that stores data obtained a predetermined time before the detection of the protection trigger, in stored data; and

managing, as blocks to be protected, blocks from the block that stores the data obtained the predetermined time before the detection to a block that stores data upon detection of a termination trigger for giving an instruction to terminate protection.

8. The non-transitory computer-readable recording medium according to claim 7, the process further comprising:

updating, when an instruction to release protection of data is provided, the protection information on a block that has stored the protection information to a released state.

9. The non-transitory computer-readable recording medium according to claim 7, wherein the updating stores, in a memory, data to be stored in a block by the storing unit upon detection of the protection trigger, and when the instruction to release protection is provided, the updating updates the protection information on the data stored in the memory to a released state, and overwrites data in the block that has stored the protection information with the updated data.