HP Surestore Tape Library Model 20/700 HP Surestore Tape Library Model 20/700 - Page 174

Appendix A Table 10 DLT Cleaning Light Issues Cause Solution Contamination by loose debris Contamination by head staining. (Caused by adhesion of chemicals that are present in the tape media to the head surface.) Temperature and humidity Non-acclimated media Wrong cleaning cartridge Wrong tape format Abnormal build up of head debris. (Frequent load/unload operations with minimal tape reading or writing can cause this condition.) Bad/defective/contaminated media Avoid by ensuring the drive is operated in a clean, contaminationfree environment. Cartridges should be stored vertically in their plastic cases. One or two passes with a cleaning tape should resolve cleaning lights caused by normal head staining. If a cleaning tape is unsuccessful in resolving a cleaning light after 3 or more attempts, the cleaning tape may be contaminated, and should NOT be used in another drive Tapes should be stored and used in the middle of the temperature and humidity specifications range of 64-79° F, and 40-60% RH. A tape should be acclimated for a minimum of 24 hours before being used, particularly if it has been stored at a substantially different temperature or level of humidity than the tape library. Only use the cleaning cartridge specifically designated for each drive type (see page 170). Attempting to load, read, or write tapes that were written in other formats can cause cleaning lights. Do not perform frequent load/unloads without also doing tape operations. If a cleaning light is cleared using a cleaning tape, and then immediately reappears when a particular cartridge is reloaded, that cartridge should be suspected as being contaminated. If this occurs, re-clean the drive, loading a known good tape. In rare cases, a tape cartridge can be worn out, have bad calibration tracks, or have a bad tape directory recorded by another drive. Expired cleaning cartridge Cleaning requested/required and overuse of cleaning cartridges Old firmware revisions Any cartridge that is suspected of being defective or contaminated should NOT be reused in any drive. A cleaning cartridge is good for 20 uses. After that, the library status screen will display EXPIRED. Use of a cleaning cartridge should only be done when the library status screen states CLEAN NEEDED. If a cleaning tape does not resolve a cleaning light issue, make sure the latest drive firmware is being used. Appendix A DLT Drives and Tape Cartridges 173