Tape library performance: Thelibrary is not efficiently backingup data1. Check the network bandwidth from the host computer. If you are backing updata over a network, consider comparing to a local-only backup.2. Ensure that the library and tape drive are on their own SCSI bus and notdaisy-chained to another tape drive or to the hard drive being backed up.3. Ensure that the library is connected to a LVDS SCSI bus and there are nosingle-ended (SE) devices on the same bus, because this will cause the entirebus to negotiate down to SE speed.4. Use an Ultra160 SCSI bus and high-quality cabling with the library.Customer Replaceable Units (CRU) and Service SparesDrive Sled See “Isolating Drive Sled Problems” on page 7-10.Power Supply See “System Status” on page 2-6 and“Isolating a Power Supply Problem” on page7-8.Library Controller Card See “Isolating a Library Controller Card vs. Accessor Enclosure Problem” on page7-11.Library Enclosure (ServiceSpare)See “Isolating a Library Controller Card vs. Accessor Enclosure Problem” on page7-11.ITDTPerformance Test durationvariesItems affecting the duration of the test are:v The level of adapter device driverv Your adapter model and typeOther ProblemsWeb User Interface problems See “Isolating Web User Interface Problems” on page 7-11.Bar code scanner problems See “Isolating Accessor Scanner Problems” on page 7-12.Host Attachment InterfaceproblemsSee “Isolating Host Attachment Interface Problems” on page 7-12Need help with a librarypassword Contact technical support.Key path diagnostic notworkingThis diagnostic is available with library firmware level greater than 6.xx. Refer to“Verifying/Updating Firmware” on page 4-17 to determine the level of firmwareon your library. If necessary, visit http://support.dell.com to download the latestlevels of firmware for your library.Auto Clean status displayed as″Chk Media/Rsvd Slot?″ on theWeb User Interface SystemStatus screen.If Auto Clean is enabled and a cleaning cartridge is not present, or if a cleaningcartridge is present but not in the reserved slot, Auto Clean status will show ″ChkMedia/Rsvd Slot?″ and Status will show a green check mark and the words″Media Attention.″Library Recovery Problem DeterminationThe 2U and 4U library firmware will generally retry failed operations up to threetimes before posting a failure to complete the operation, or, in some situations,proceeding with an operation that can be completed in an alternative manner. Ofcourse, if the operation is successful within the allotted retry count, the appropriateretry counter is updated and recorded in the retry log and the next libraryoperation will commence.For example, failure to pick or place a cartridge from or to a designated cell ordrive location after exhausting the retry count will result in a failed operation withthe appropriate error code. However, failure to detect a particular cell location bysensing the prism fiducial located on the cell shelf because it is missing ordamaged will eventually result in the cell location being located by the gripper, barChapter 7. Troubleshooting 7-7
