A servo system includes multiple servo channels being driven by a common error signal. The lampholder is capable of supporting various types andor sizes of fluorescent lamps such as \u201ctall\u201d, \u201cmedium\u201d and \u201csmall\u201d T-8 fluorescent lamps as well as other types andor sizes of fluorescent lamps. The coated product can comprise a substrate, an undercoat layer, and an emulsion layer. Appropriate attributes on the selected coredump disk are written to indicate that a coredump is in progress, and the location of the coredump data.