Dell TL2000 - Manual (Page 161)

Tape library performance: The
library is not efficiently backing
up data
1. Check the network bandwidth from the host computer. If you are backing up
data 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 not
daisy-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 no
single-ended (SE) devices on the same bus, because this will cause the entire
bus 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 Spares
Drive 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 page
7-8.
Library Controller Card See “Isolating a Library Controller Card vs. Accessor Enclosure Problem” on page
7-11.
Library Enclosure (Service
Spare)
See “Isolating a Library Controller Card vs. Accessor Enclosure Problem” on page
7-11.
ITDT
Performance Test duration
varies
Items affecting the duration of the test are:
v The level of adapter device driver
v Your adapter model and type
Other Problems
Web 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 Interface
problems
See “Isolating Host Attachment Interface Problems” on page 7-12
Need help with a library
password Contact technical support.
Key path diagnostic not
working
This 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 firmware
on your library. If necessary, visit http://support.dell.com to download the latest
levels of firmware for your library.
Auto Clean status displayed as
″Chk Media/Rsvd Slot? ″ on the
Web User Interface System
Status screen.
If Auto Clean is enabled and a cleaning cartridge is not present, or if a cleaning
cartridge is present but not in the reserved slot, Auto Clean status will show ″Chk
Media/Rsvd Slot? ″ and Status will show a green check mark and the words
″Media Attention. ″
Library Recovery Problem Determination
The 2U and 4U library firmware will generally retry failed operations up to three
times before posting a failure to complete the operation, or, in some situations,
proceeding with an operation that can be completed in an alternative manner. Of
course, if the operation is successful within the allotted retry count, the appropriate
retry counter is updated and recorded in the retry log and the next library
operation will commence.
For example, failure to pick or place a cartridge from or to a designated cell or
drive location after exhausting the retry count will result in a failed operation with
the appropriate error code. However, failure to detect a particular cell location by
sensing the prism fiducial located on the cell shelf because it is missing or
damaged will eventually result in the cell location being located by the gripper, bar
Chapter 7. Troubleshooting 7-7