| 摘要 |
PURPOSE:To realize the high-speed reading and transfer regardless of the quality of media, by giving an integrated retrial process successively to the codes having errors for each designated read data length. CONSTITUTION:When a read instruction is applied from a CPU, etc. of a main system, a memory controller 2 sets the data length L to be read, the write address to the 2nd memory 3, etc. and then transmits a read command to a magnetic disk device 1. With this command data #A-#D are read out successively from the device 1 for each record, and the read error information is set to a control table 4 for each record in reponse to the error check codes added to the records #A-#D. The read data are written successively to the memory 3 regardless of the presence or absence of a read error. When the transfer is over with all data of designated length L, the controller 2 checks the table 4 and decides to complete the operation or to start a retry operation in accordance with the contents of the table 4. |
