For the Linux platforms, if you do not know the SCSI parameters of a tape device, then you must determine them before you begin installation. This appendix describes procedures for determining SCSI device parameters on Linux.
To obtain tape device information on Linux, use the cat
command to view the contents of /proc/scsi/scsi
. For example:
# cat /proc/scsi/scsi
See Also:
"Identifying and Configuring Linux Attach Points" for information about configuring attach points for LinuxExample C-1 shows sample output for a host called storabck05
with two attached tape devices.
Example C-1 Sample /proc/scsi/scsi Contents
Attached devices: Host: scsi0 Channel: 00 Id: 02 Lun: 00 Vendor: IBM Model: ULTRIUM-TD2 Rev: 4772 Type: Sequential-Access ANSI SCSI revision: 03 Host: scsi0 Channel: 00 Id: 04 Lun: 00 Vendor: ADIC Model: Scalar 24 Rev: 237A Type: Medium Changer ANSI SCSI revision: 02
A device of type Sequential-Access
, such as the first tape device in the list, is a tape drive. A device of type Medium Changer
, such as the second tape device, is a tape library.
For each tape device, the information needed is found in the line that reads:
Host: scsi0 Channel: 00 Id: 02 Lun: 00
The output can be interpreted as follows:
The host bus adapter number is the numeric part of the value scsi
n
. For example, for both tape devices in this output the host bus adapter number is 0
.
The value for Channel
is the SCSI bus address. For example, in this output the SCSI bus address is 0
.
The value for Id
is the target ID. For example, in this output the ID of the tape drive is 2
, and the ID of the tape library is 4
.
The value for Lun
is the SCSI LUN. For example, in this output the SCSI LUN of both tape devices is 0
.
By convention, the tape library and tape drive can each be assigned 0
as the Oracle Secure Backup logical unit number.
Based on the output shown in Example C-1, Table C-1 summarizes the tape device information for storabck05.