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.
Summary of Contents for LTO-4 (Model B)
Page 6: ...Contents vi LTO 4 Model B Half Height Tape Drive User s Guide Index 81...
Page 8: ...Figures viii LTO 4 Model B Half Height Tape Drive User s Guide...
Page 10: ...Tables x LTO 4 Model B Half Height Tape Drive User s Guide...
Page 20: ...Chapter 1 Introduction Features 4 LTO 4 Model B Half Height Tape Drive User s Guide...
Page 92: ...76 LTO 4 Model B Half Height Tape Drive User s Guide...