Using reason codes to determine how to handle memory device error conditions
First Claim
1. A method for execution by one or more processing modules of one or more computing devices of a dispersed storage network (DSN), the method comprises:
- detecting, while a storage unit retaining dispersed storage error encoded data is servicing encoded data slice access messages from a DSN processing unit, a memory error associated with a memory device of the storage unit, wherein the detecting occurs while attempting to access one or more of;
a read threshold number (R) of encoded data slices to be read from one or more of the storage units for decoding of a segment of the data, a decode threshold number (D) of encoded data slices needed to reconstruct the data, or a write threshold number (W) indicating a number of encoded data slices that must be accurately stored in the one or more storage units before the encoded data segment is deemed to have been properly stored;
identifying an error descriptor code based on the detected memory error;
determining whether to perform an intermediate action based on the error descriptor code;
when not performing the intermediate action, issuing memory status information to a distributed storage and task network (DSTN) managing unit;
when performing the intermediate action, executing a lookup in an intermediate action table using the error descriptor code to identify the intermediate action and executing the identified intermediate action to produce an action result;
determining whether the memory device is to remain in service based on one or more of the action result and the error descriptor code; and
when the memory device is not to remain in service, issuing further status information to the DSTN managing unit to indicate a failed status.
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Accused Products
Abstract
A method for dispersed storage network (DSN) begins by detecting a memory error associated with a memory device of a storage unit. The method continues by identifying an error descriptor code based on the detected memory error. The method continues by determining whether to perform an intermediate action based on the error descriptor code. The method continues, when not performing the intermediate action, by issuing memory status information to the DSTN managing unit. The method continues, when performing the intermediate action, by performing the intermediate action to produce an action result. The method continues by determining whether the memory device is to remain in service based on one or more of the action result and the error descriptor code and, when the memory device is not to remain in service, issuing further status information to the DSTN managing unit to indicate the failed status indicator.
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Citations
18 Claims
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1. A method for execution by one or more processing modules of one or more computing devices of a dispersed storage network (DSN), the method comprises:
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detecting, while a storage unit retaining dispersed storage error encoded data is servicing encoded data slice access messages from a DSN processing unit, a memory error associated with a memory device of the storage unit, wherein the detecting occurs while attempting to access one or more of;
a read threshold number (R) of encoded data slices to be read from one or more of the storage units for decoding of a segment of the data, a decode threshold number (D) of encoded data slices needed to reconstruct the data, or a write threshold number (W) indicating a number of encoded data slices that must be accurately stored in the one or more storage units before the encoded data segment is deemed to have been properly stored;identifying an error descriptor code based on the detected memory error; determining whether to perform an intermediate action based on the error descriptor code; when not performing the intermediate action, issuing memory status information to a distributed storage and task network (DSTN) managing unit; when performing the intermediate action, executing a lookup in an intermediate action table using the error descriptor code to identify the intermediate action and executing the identified intermediate action to produce an action result; determining whether the memory device is to remain in service based on one or more of the action result and the error descriptor code; and when the memory device is not to remain in service, issuing further status information to the DSTN managing unit to indicate a failed status. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10)
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11. A computing device of a group of computing devices of a dispersed storage network (DSN), the computing device comprises:
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an interface; a local memory; and a processing module operably coupled to the interface and the local memory, wherein the processing module functions to; detect, while a storage unit retaining dispersed storage error encoded data within the DSN is servicing encoded data slice access messages from a DSN processing unit, a memory error associated with the memory device of a storage unit, wherein the detecting occurs while attempting to access one or more of;
a read threshold number (R) of encoded data slices to be read from one or more of the storage units for decoding of a segment of the data, a decode threshold number (D) of encoded data slices needed to reconstruct the data, or a write threshold number (W) indicating a number of encoded data slices that must be accurately stored in the one or more storage units before the encoded data segment is deemed to have been properly stored;identify an error descriptor code based on the detected memory error; determine whether to perform an intermediate action based on the error descriptor code; when not performing the intermediate action, issue memory status information to a distributed storage and task network (DSTN) managing unit; when performing the intermediate action, executing a lookup in an intermediate action table using the error descriptor code to identify the intermediate action and executing the identified intermediate action to produce an action result; determine whether the memory device is to remain in service based on one or more of the action result and the error descriptor code; and when the memory device is not to remain in service, issue further status information to the DSTN managing unit to indicate a failed status. - View Dependent Claims (12, 13, 14, 15, 16, 17, 18)
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Specification