These errors may be due to incorrect information reported by the FWB driver, and do not necessarily represent actual problems on the disk. Please contact Technical Support for more information. Speed Disk may report errors such as as -56 while optimizing drives formatted with any version of FWB 2.x. If this problem persists, you may wish to try reformatting the drive with a different driver such as Apple's Drive Setup.
Readers are concerned about the ambiguity of the message.
Users can choose to ignore the messages, if they get them. They may also choose to contact Tech Support for possible additional information or they might choose to format with a different driver. Few users will encounter these problems, and neither are data destructive. These issues are unique to FWB's 2.x and 2.5 drivers and we have taken steps to work with FWB to resolve them. We hope to find a solution in the future, whether it comes from FWB or Symantec.