DEVICE-STATUS TABLE device:card reader 1 status:idle device:line printer 3 request for status:busy line printer address:38546 device:disk unit 1 length:1372 status:idle device:disk unit 2 status:idle device:disk unit 3 status:busy request for request for disk unit 3 disk unit 3 file:xxx file:yyy operation:read operation:write address:43046 address:03458 length:20000 length:500DEVICE-STATUS TABLE