Table 4 Troubleshooting Table

Problem

Solution

 

 

SCSI ID

Changed drive SCSI ID, but

■

Make sure that all SCSI devices on the same bus have unique ID

the host server does not

 

numbers.

recognize the new ID.

■

If the SCSI bus is narrow (50-pin) only SCSI IDs 0 through 7 are

 

 

 

available.

 

■ Make sure that you cycle power on the autoloader after

 

 

changing the SCSI ID.

 

■ Reboot the host server.

 

 

 

Autoloader performance

 

 

 

 

 

The autoloader is not efficiently

■

Check the network bandwidth from the host computer if you are

backing up data.

 

backing up data over a network. Consider comparing to a local-

 

 

only backup.

 

■ Make sure that the autoloader is on its own SCSI bus and not

 

 

daisy-chained to another tape drive or to the hard drive being

 

 

backed up.

 

■ Clean the tape drive. See Cleaning the Tape Drive on page 36

 

 

for instructions.

 

■ Try a new cartridge. A marginal cartridge can cause

 

 

performance problems due to bad spots on the tape requiring

 

 

retries.

 

■ Make sure that the data is being compressed.

 

■ Check the size of the files. Small file size can impact

 

 

performance.

 

■ Confirm that the backup application is utilizing block sizes of at

 

 

least 32KB, preferably 64KB. Refer to the backup application

 

 

documentation for details.

 

 

 

 

 

 

58 Diagnostics and Troubleshooting

Chapter 4