HP vs80 manual Scsi ID

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