Abstract: An exception handling machine is configured to receive a first document from a source document processing system and provide a first revised document to a destination document processing system. The exception handling machine is configured to detect an exception flag in at least one data field of the first document and determine at least one exception handling rule for the first document based on at least one other data field in the first document and the exception flag, determine an exception code corresponding to the exception handling rule, insert the exception code into the first document to generate the first revised document, and provide the first revised document to the destination document processing system. The destination document processing system is programmed to respond to the exception code inserted in the revised first document by providing the first revised document to a client device connected to the destination document processing system.

Abstract: A method for writing servo information onto a disk of a hard disk drive with a servo writer. The method includes writing a plurality of spiral servo signals with a head. The spiral servo signals are used to write servo patterns using at least one timing window. The timing window is adjusted using a position error signal generated from the spiral servo signals. The adjusted timing window is then used to write servo patterns onto the disk. Adjusting the timing window compensates for irregularities in the spiral servo signals.