Abstract: Operator authorizations are autonomically adjusted in many ways to automatically account for many different variables. Operator authorization may be adjusted according to an operator's past activity record so previous experience is not lost when the operator is rehired. Operator authorization may be adjusted according to the operator's quality and performance. Operator authorization may also be adjusted by recognizing similar operations to those the operator is authorized to perform, and authorizing the operator to perform one or more similar operations. Operator authorization may also be adjusted to a lesser level or may be revoked for an operation based on the passage of time. A manufacturing system may efficiently track operators taking into account different activity periods, the passage of time, the operator's performance, and similar operations to autonomically adjust the authorization of the operators as needed.

Abstract: An apparatus and method for correcting up to two errors in a sequence of data elements read front a data track of a disc drive and detecting the occurrence of more than two errors. A syndrome generator determines a syndrome, having five components, from the data elements and the components are transmitted to a syndrome weight generator that provides an indication of a syndrome having a zero Hamming weight and to a detector that generates an indication of whether a selected component is zero. These indications are transmitted to a decoder. A determinant generator generates determinants that are combinations of selected components and a determinant weight generator determines a code indicating the Hamming weight of selected determinants. Such code is transmitted to the decoder. Discriminator and trace detectors generate additional signals determined from the components and determinants that are transmitted to the decoder.