Verifying slice migration in a storage network

A storage network comprises:

• a source storage unit located in a first location comprising:
• at least one first processor;
• and
• at least one first memory section that stores first operational instructions;
• and
• a destination storage unit located in a second location comprising:
• at least one second processor;
• and
• at least one second memory section that stores second operational instructions that, when executed by the at least one second processor, cause a second processing system of the destination storage unit to:
• store a slice in memory of the destination storage unit based on migration of the slice from the source storage unit to the destination storage unit;
• wherein the first operational instructions, when executed by the at least one first processor, cause a first processing system of the source storage unit to:
• send a slice verification request to the destination storage unit, wherein the slice verification request corresponds to a migration of the slice from the source storage unit to the destination storage unit, wherein the slice verification request includes a nonce and one or more of:
• a slice identifier, the slice, a revision indicator, or a verification method indicator;
• wherein the second operational instructions, when executed by the at least one second processor, further cause the second processing system of the destination storage unit to:
• send an integrity value to the source storage unit based on the slice verification request;
• wherein the first operational instructions, when executed by the at least one first processor, further cause the first processing system of the source storage unit to:
• receive the integrity value from the destination storage unit;
• determine when the integrity value is verified by determining one of:
• when a hash of the slice and the nonce matches the integrity value;
• when a decrypted signature of the integrity value matches a hash of the slice and the nonce;
• or
• when the decrypted signature of the integrity value matches the slice and the nonce;
• and
• when the integrity value is verified, updating a slice assignment corresponding to the slice, wherein updating the slice assignment associates the destination storage unit with the slice and disassociates the source storage unit from the slice.