Retry method and apparatus for use in a magnetic recording and reproducing system

摘要: A magnetic tape subsystem includes a peripheral controller which processes data signals of block received during the reading and recording on medium by selected one plurality devices in response to commands from processing system. The recovery unit having storage indicators. These indicators are set accordance with characteristics recovered providing indications results or operation performed device controller's execution command. divides up interval time an into number periods monitors should be those intervals. During write command, different intervals monitoring continuity recorded receives its performance read after checking operation. various signal whether written was normal damaged addition signaling extent damage occurred writing block. Signals representative grouped specify at least two types error conditions tested establish command is retryable nonretryable. initiates retry executed only when indicator that has not exceeded predetermined amount thereby ensuring can retried successfully re-executed. performs similar operations for establishing used determining upon detection errors unit.