US Patent 7428656 Performing retry operations

A method of performing a retry procedure may begin with detecting an error in a first zone of a data storage medium. Upon detecting the error, it is determined whether any retry procedure of a sequence of retry procedures has been performed upon detecting a previous error in the first zone. If a first retry procedure of the sequence was unsuccessfully performed upon detecting the previous error, there is performed a second retry procedure that follows next after the first retry procedure in the sequence.