| http://www.w3.org/ns/prov#value | - ctions comprising steps for:receiving a plurality of logical volumes V1 -Vm of user data to be recorded onto corresponding pieces of removable media R1 -Rm, each of the logical volumes V1 -Vm having a plurality of data blocks including at least a first data block Bq, where q is a logical volume number between 1 and m, inclusive; computing a first parity block P1 from the first data blocks B1 -Bm
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