A specially formatted WORM tape cartridge is required because standard read/write media  are incompatible with the WORM feature. Each WORM cartridge has a unique worldwide  cartridge identifier (WWCID), which comprises the unique Cartridge Memory (CM) chip serial  number and the unique tape media serial number. For more information about WORM media,  see “WORM tape format” on page 51. A specially labeled IBM LTO Ultrium Cleaning Cartridge cleans the drive. One cleaning  cartridge is included with the shipping package of the TS2280 tape drive. Important:  The drive automatically ejects an expired cleaning cartridge. For more information, see “Specifications for cleaning cartridges” on page 59. All generations of the IBM LTO Ultrium data cartridges include a Linear Tape-Open Cartridge  Memory (LTO-CM) chip, which is a passive contact-less silicon storage device that is  physically a part of the cartridge. It holds information about the specific cartridge, the media in  the tape drive, and the data on the media. The LTO-CM enhances the efficiency of the cartridge and aids in determining the reliability of  the cartridge by storing data about its age, how many times it was loaded, and how many  errors it accumulated. Whenever a tape cartridge is unloaded, the tape drive writes any  pertinent information to the cartridge memory. A cleaning cartridge’s LTO-CM chip tracks the  number of times that the cartridge is used to prevent it from being used more than 50 times.  The storage capacity of the Ultrium 8 Tape Cartridge Memory Chip is 16320 bytes.  Communication between the TS2280 tape drive and the LTO-CM is through a low-level radio  frequency field that is transmitted by the drive to the cartridge.  The TS2280 tape drive supports host AME, which uses T10 protocols. In this drive, data  encryption is supported by LTO Ultrium 8, and 7 data cartridges. The TS2280 tape drive has a white key symbol on the front of the tape drive that indicates the  encryption status, as shown in Figure 4-3. It illuminates only when an Ultrium 8 or 7 data  cartridge is loaded and all data on the cartridge is encrypted. 4.3.3 Cleaning cartridges 4.3.4 Cartridge memory 4.4 Encryption Figure 4-3 Front view of TS2270 showing illuminated encryption symbol 182  IBM Tape Library Guide for Open Systems