Patent ID: 6963958

Claim:
A back-up and archiving system with tape cassettes for data processing systems comprising: at least one Data Port ( 15 ) for receiving data to be stored in memory, at least one Cassette Drive ( 2 ) for tape cassettes, an Interface Unit ( 5 ) for connecting the at least one Data Port with the at least one Cassette Drive ( 2 ), comprising: a Disk Memory Subsystem ( 3 ) with at least one Disk Memory Unit ( 4 ) for temporary storage of data to be backed up and secured on the tape cassettes, a second Function Unit ( 11 ) adapted to transfer the data received by at least one Data Port ( 15 ) to the Disk Memory Subsystem ( 3 ), wherein said second function unit includes at least one Component Computer ( 6 ), a third Function Unit ( 12 ) adapted to transfer the data temporarily stored on the Disk Memory Subsystem ( 3 ) to the at least one Cassette Drive ( 2 ), wherein said third function unit includes at least one Component Computer ( 6 ), and a first Function Unit ( 10 ) adapted to control the second and third Function Units ( 11 , 12 ) in order to coordinate data flow between the Data Port and the Cassette Drive via the Disk Memory Subsystem ( 3 ), wherein said first function unit includes at least one Component Computer ( 6 ).