LTO cartridges (all of them: LTO2, LTO3, LTO4, LTO 5 & latest generation LTO-6 media) have an internal memory chip that transfers data to the drive or external/internal memory card reader. The Ultrium 1 CM (Cartridge Memory) has a 4 KB capacity for storing vital information regarding the backup tape. Similarly, the LTO-3 ultrium and higher generation tapes have an 8 KB memory. This includes the usage history, number of loads, past errors, etc regarding the storage media. Cartridge Memory (CM) readers such as the above are capable of extracting this information and presenting it in a concise form.