Quantum LTO 4 Guia do Utilizador descarregar pdf (Página 73)

Chapter 6 Troubleshooting Guide

Troubleshooting Suggestions

LTO-4 (Model B) Half-Height Tape Drive User’s Guide 57

/dev/st0 or /dev/nst0.

There are various ways to view the log files to see whether Linux

recognizes the tape drive:

• One method is to open a terminal window and issue the following

command from the root directory:

dmesg | grep SCSI

This command produces an output similar to:

(scsi0)<Adaptec AHA-294XX Ultra2 SCSI host adapter> found

at PCI 0/16/0

• Another method might be to use the command:

cat /proc/scsi/scsi

This command produces an output similar to:

Host: scsi0 Channel: 0 Id:6 Lun:00

Vendor: Quantum Model: ULTRIUM 4 Rev: 1897

Type: Sequential-Access ANSI SCSI revision 04

• You can also use a text editor to view the messages in the file

/var/

log/

and look for tape drive entries.

• Sometimes a system can have multiple tape device names in the

/dev

directory and will not know which st number to use. To view the st

device number for your attached tape drive, use the command:

dmesg | grep tape

This command produces an output similar to:

Detected SCSI tape st0 and scsi0 . . .

Slow Backup

Operations

Many factors can make backups appear to be slow. To achieve the

highest possible transfer rate, the LTO-4 (Model B) Half-Height Tape

Drive:

• MUST be attached to a Low Voltage Differential (Ultra320 SCSI) SCSI

controller capable of a minimum of 80 Mbytes per sec., and

• MUST NOT share the same SCSI bus as another active SCSI device

such as hard drives.

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