http://www.itdevicesonline.com - The HP Ultrium Universal Cleaning Cartridge C7978A has excellent capacity of 50 cleanings but most of the time it depends on specific tape drive. The cleaning process is very easy and these cartridges should use when the Ultrium drive's light is illuminated therefore it is not required the routine cleaning procedures it is all depend on Ultrium tape drives when they need cleaning. If the cartridge has already expired the tape drive will not accept the cartridge for further cleaning process. The TapeAlert function becomes activated if the cleaning cartridge completes its life span. The univers