Each 3592 data cartridge contains a passive, contactless, silicon storage device called cartridge memory (CM). This CM holds information about the cartridge and the media in the cartridge, and holds statistics about the media in the cartridge. The cartridge and media information is stored in a protected, read-only area of the CM. This information is read by the CM reader in the drive with a contactless, radio-frequency interface, when the cartridge is loaded into the drive. The media performance statistics are stored in an unprotected, read/write area of the CM. These statistics are updated by the CM reader just before the cartridge is unloaded. The media performance statistics are maintained by the Statistical Analysis and Reporting System (SARS) portion of the drive microcode. Each cleaning cartridge also contains a CM, which tracks the number of cleaning uses.