Access control apparatus and access control method
AssigneeToshiba Storage Device Corporation
InventorHiroaki Murai
Life of this patent
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Abstract
An access control apparatus includes a memory and a command executor executing an access process on a command with the command completion time limit. An address of an inaccessible recording area is stored in the memory. Data attempted to be written on the inaccessible recording area is obtained. The data is stored in association with the address in the memory. An automated alternate processor executes the automated alternate process of the inaccessible recording area in a predefined period of time after the process executed by the command executor is completed. A memory updater deletes the address of the inaccessible recording area whose automated alternate process has succeeded and the data attempted to be written in the recording area at the address.
Claims12
An access control apparatus controlling an access to a recording area of a recording medium on a command with a command completion time limit requiring completing the command in a predefined period of time, the access control apparatus comprising:
- a writable and readable memory;
- a command executor executing an access process on the command with the command completion time limit, storing an address of an inaccessible recording area in the memory when an access error is caused, obtaining data attempted to be written on the inaccessible recording area, storing the data associating to the address of the inaccessible recording area in the memory;
- an automated alternate processor executing an automated alternate process of the inaccessible recording area in a predefined period of time after the process executed by the command executor is completed;
- and
- a memory updater deleting the address of the inaccessible recording area whose automated alternate process has succeeded and the data attempted to be written in the recording area at the address from the memory.
An access control method controlling an access to a recording area on a recording medium on a command with a time limit requiring completing the command in a predefined period of time, the access control method comprising:
- executing an access process on the command with the time limit,
- associating an address of an inaccessible recording area with data attempted to be written in the inaccessible recording area at the address;
- storing the address and the data in a memory when an access error is caused;
- executing an automated alternate process of the inaccessible recording area in the predefined period of time;
- and
- deleting the address of the recording area whose automated alternate process has succeeded and the data attempted to be written in the recording area at the address from the memory in response to the success of the automated alternate process.
Dependencies are inferred from the claim text.