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Finding alternate storage locations to support failing disk migration

  • US 10,305,989 B2
  • Filed: 10/25/2018
  • Issued: 05/28/2019
  • Est. Priority Date: 09/30/2005
  • Status: Active Grant
First Claim
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1. A computing device comprising:

  • an interface configured to interface and communicate with a dispersed or distributed storage network (DSN);

    memory that stores operational instructions; and

    processing circuitry operably coupled to the interface and to the memory, wherein the processing circuitry is configured to execute the operational instructions to;

    based on a potentially adverse storage issue associated with a first memory device of a storage unit (SU) of one or more sets of storage units (SUs) within the DSN that is based on at least one of predicted failure of the first memory device, an age of the first memory device being greater than or equal to a maximum age threshold level, or an indication that the first memory device is failing, identify at least one alternate storage location within the DSN to store temporarily at least one encoded data slice (EDS) of a set of encoded data slices (EDSs) that is associated with the first memory device of the SU of the one or more sets of SUs within the DSN, wherein a data object is segmented into a plurality of data segments, wherein a data segment of the plurality of data segments is dispersed error encoded in accordance with dispersed error encoding parameters to produce a set of EDSs that are distributedly stored within the one or more sets of storage units SUs within the DSN;

    facilitate transfer of the at least one EDS of the set of EDSs that is associated with the first memory device of the SU of the one or more sets of SUs within the DSN to the at least one alternate storage location within the DSN for temporary storage therein;

    based on detection that the potentially adverse storage issue with the first memory device of the SU of the one or more sets of SUs within the DSN has subsided, facilitate transfer of the at least one EDS of the set of EDSs from the at least one alternate storage location within the DSN back to the first memory device of the SU of the one or more sets of SUs within the DSN; and

    based on detection of replacement of the first memory device of the SU of the one or more sets of SUs within the DSN with a second memory device, facilitate transfer of the at least one EDS of the set of EDSs from the at least one alternate storage location within the DSN to the second memory device of the SU of the one or more sets of SUs within the DSN.

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