Redundant data storage reconfiguration

A method of reconfiguring a redundant data storage system comprising:

• redundantly storing a data segment by a first group of storage devices, at least a quorum of storage devices of the first group each storing at least a portion of the data segment or redundant data;
• forming a second group of storage devices, the second group having different membership from the first group;
• identifying at least one member of the second group that does not have at least a portion of the data segment or redundant data that is consistent with data stored by other members of the second group;
• and
• writing at least a portion of the data segment or redundant data to the at least one member of the second group.

A method of reconfiguring a redundant data storage system comprising:

• redundantly storing a data segment by a first group of storage devices, at least a quorum of storage devices of the first group each storing at least a portion of the data segment or redundant data;
• forming a second group of storage devices, the second group having different membership from the first group;
• and
• if not every quorum of the first group of the storage devices is a quorum of the second group, writing at least a portion of the data segment or redundant data to at least one of the storage devices of the second group and, otherwise, skipping said writing.

A computer readable medium comprising computer code for implementing a method of reconfiguring a redundant data storage system, the method comprising steps of:

• redundantly storing a plurality of data segments by a first group of storage devices, at least a quorum of storage devices of the first group each storing at least a portion of each data segment or redundant data;
• forming a second group of storage devices, the second group having different membership from the first group;
• identifying a data segment among the plurality for which a consistent version is not stored by at least a quorum of the second group;
• and
• writing at least a portion of the identified data segment or redundant data to at least one of the storage devices of the second group thereby at least a quorum of the second group stores a consistent version of the identified data segment.

A computer readable medium comprising computer code for implementing a method of reconfiguring a redundant data storage system, the method comprising steps of:

• redundantly storing a data segment by a first group of storage devices, at least a quorum of storage devices of the first group each storing at least a portion of the data segment or redundant data;
• forming a second group of storage devices, the second group having different membership from the first group;
• identifying at least one member of the second group that does not have at least a portion of the data segment or redundant data that is consistent with data stored by other members of the second group;
• and
• writing at least a portion of the data segment or redundant data to the at least one member of the second group.

A computer readable medium comprising computer code for implementing a method of reconfiguring a redundant data storage system, the method comprising steps of:

• redundantly storing a data segment by a first group of storage devices, at least a quorum of storage devices of the first group each storing at least a portion of the data segment or redundant data;
• forming a second group of storage devices, the second group having different membership from the first group;
• and
• if not every quorum of the first group of the storage devices is a quorum of the second group, writing at least a portion of the data segment or redundant data to at least one of the storage devices of the second group and, otherwise, skipping said writing.