Compaq ProLiant 4500 ProLiant Server Troubleshooting Guide - Page 153
Preventing Tape Drive Errors, Clean the media four times after a failure occurs.
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Error Prevention Preventing Tape Drive Errors Often tape drive problems are caused by defective or substandard media. The following are recommended cleaning procedures: • Clean the media every eight hours. This is much more frequent than the manufacturer's recommendation of "once every 25 hours," but this practice reduces the number of device failures. Cleaning frequently is especially important for new media, which requires more frequent cleaning than media that has been used for five or more backups. • Clean the media four times after a failure occurs. • If you receive a head clog error (and you are using the latest firmware and cleaning every eight hours), record that a failure occurred on the label of the cartridge. Then, replace any cartridges that fail more than three out of five times. HP Servers Troubleshooting Guide 6-13