JPH0314054A - Electronic disk device - Google Patents

Abstract

PURPOSE:To improve maintenance by periodically reading a memory part by a memory control part and performing the correcting operation of the memory part in the case of correctable error but reporting error to a main control part in case of uncorrectable error. CONSTITUTION:A data storage part (b) is provided with a memory check circuit part (d) which periodically reads a memory part (f) under the control of a memory control part (e), a memory control part (e) which corrects contents of the memory part (f) to perform rewrite at the time of detecting correctable error as the result of error check, and an adapter part (c) which reports the occurrence of uncorrectable error to a main control part (a) at the time of detecting this error as the result of error check. Thus, the error check means (d) can interruptedly check error of the memory part (f) of the data storage part (b) by the memory control part (e) even during the access from the main control part (a) to the data storage part (b).

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an electronic disk device, and more particularly to improving the maintainability of a data storage section in an electronic disk device.

[Prior Art] Conventionally, in this type of electronic disk device, even if a failure occurs due to a memory error in the data storage unit, the main control unit receives a command from a host device to read the memory in which the failure occurs due to a memory error. Since it is not possible to detect a failure due to a memory error unless the above command is executed, the fact that a memory error has occurred in response to the above command is reported to the host device.

[Problem to be solved by the invention] In the conventional electronic disk device mentioned above.

Even if a memory error occurs in the data storage unit.

Unless the main control unit receives a command from the host device and reads the memory where the memory error has occurred.

This is because failures due to memory errors cannot be detected.

Maintenance for memory error failures will be delayed,
If an uncorrectable memory error occurs,
There is a drawback that a command from a host device that reads or writes the memory address ends abnormally.

[Means for Solving the Problems] An electronic disk device according to the present invention includes a data storage unit that has a memory unit that stores data and a memory control unit that controls the memory unit, and an electronic disk device that stores data based on instructions from a host device. In an electronic disk device comprising a main control section that controls the data storage section, the data storage section reads the memory section at regular intervals under the control of the memory control section; means for error checking the memory section;
As a result of the error check, if the error is a correctable error, the contents of the memory section are corrected and rewritten, and if the error check is an uncorrectable error, the main control section is provided with means for correcting the error. and a means for reporting that a possible error has occurred.

[Function] Even when the main control unit is accessing the data storage unit in response to a command from the host device, the memory control unit causes the error checking unit to perform an error check on the memory unit of the data storage unit. Do it intermittently.

[Example] The present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing an electronic disk device according to an embodiment of the present invention.

The electronic disk device of this embodiment has a main control section a and a data storage section. The main control section a receives commands from a host device (not shown) and controls the data storage section.

FIG. 2 is a block diagram showing the data storage section in FIG. 1.

The data storage section includes an adapter section C, a memory check circuit section d, a memory control section e, and a memory section f.

The memory section f is composed of a plurality of IC memories that are volatile storage elements. The memory control section e controls the memory section f. The memory check circuit section d reads the memory section f at regular intervals under the control of the memory control section e, and performs an error check on the memory section f.

Next, the operation of this embodiment will be explained.

The main control section a performs a read or write operation on the memory section f through the control signal line 11 in response to a command from a host device. The memory control unit e is.

The free time in the memory section f is checked, a read operation is performed on the memory section f, the presence or absence of a memory error is checked by the memory check circuit section d, and if it is a correctable memory error, it is corrected by the memory control section e and rewritten. I do. In the case of an uncorrectable error, the memory control unit e reports the fact to the main control unit a.

[Effect of the invention] As explained above, one aspect of the present invention includes a main control section.

Even when the data storage section is read or written by a command from a host device.

The memory control unit resets the memory unit at regular intervals,
If it is a correctable error, a correction operation is performed on the memory section, and if it is an uncorrectable error, the main control section is notified of this, so that the memory section for which the host device does not issue a command is also checked for errors. This has the effect of improving maintenance.

[Brief explanation of the drawing]

FIG. 1 is a system block diagram showing an electronic disk device according to an embodiment of the present invention, and FIG. 2 is a block diagram showing a data storage section in FIG. 1. a... Main control section, b... Data storage section, C... Adapter section, d... Memory check circuit section, e... Memory control section, f... Memory section, 11...・Main control unit
Control signal line between data storage units, 21... memory control unit -
Control signal line between memory sections.

Claims (1)

[Claims] 1. A data storage unit having a memory unit for storing data and a memory control unit for controlling the memory unit, and a data storage unit that controls the data storage unit based on a command from a host device. In the electronic disk device, the data storage section reads the memory section at regular intervals under the control of the memory control section, and performs an error check on the memory section. and the result of the error check,
If the error is correctable, correct the contents of the memory section,
An electronic disk device characterized by comprising means for rewriting, and means for reporting to the main control unit that an uncorrectable error has occurred if the error check results in an uncorrectable error.