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Chapter 6 UNIX Settings
Configuring for Linux
LTO-2 Half-Height Tape Drive User’s Guide 59
You may see output similar to:
(scsi0)<Adaptec AHA-294XX Ultra2 SCSI host
adapter> found at PCI 0/16/0
To find existing SCSI devices execute the command:
cat /proc/scsi/scsi
You may see output similar to:
Host: scsi0 Channel: 0 Id:6 Lun:00
Vendor: CERTANCE Model: ULTRIUM2
Type: SequentialAccess ANSI SCSI
Revision 03
Use the output of these two commands to see which SCSI target id
numbers are free. In the above example a tape drive is attached at target
id 6. SCSI ID #7 is almost always dedicated to the SCSI controller. Never
configure your target device for ID 7 unless you are absolutely sure that
the controller is not addressed for ID 7.
The widely available distributions of Linux automatically install the
proper SCSI and tape device drivers. If you executed the cat command
above, you have ensured that the SCSI driver for your controller is
installed. To view currently loaded modules, execute the
lsmod
command. Ensure that one of the entries is st.
To view the st device number for your attached tape drive, execute the
command:
dmesg | grep tape
You should see output similar to:
Detected SCSI tape st0 and scsi0 . . .
Using the LTO-2
Half-Height Tape
Drive
6
The LTO-2 Half-Height Tape Drive can be configured via the mt
command options and a default configuration can be setup using the
‘stsetoptions’ command from within the mt command. See the man page
for
mt for details. We suggest not using the erase command nor
commands which attempt to partition the tape. Partitioning is not
supported in the LTO format.
For commands that use density and tape size settings, the tape density is
124,000 bpi and the tape length is 1800 feet. For commands that use a
blocking factor, we suggest a factor of 128.