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Configuring Robotic Controls

Configuring SCSI Robotic Control Device Paths (2.4 kernel)

The binary /usr/openv/volmgr/bin/make_scsi_dev creates device files in the

/dev/sg directory. The names of these files in this directory have the following format:

HOST

CHANNEL

TARGET

LUN

Where:

◆ HOST is the host bus adaptor.

◆ CHANNEL is channel.

◆ TARGET is the target ID.

◆ LUN is the logical unit number.

Use the files in the /dev/sg directory for the robotic path when using Media Manager

interfaces to configure robots.

There must be a /dev/sgN entry (where N is a decimal number from 0 to 255) for each

device. These entries are needed by make_scsi_dev, which is run during the NetBackup

installation.

If you have devices that are not being discovered by Media Manager device discovery, it

may be because the Linux default number of these entries is not sufficient. You may need

to create additional entries.

Create device entries as follows, where N is a decimal number from 0 to 255. After creating

all entries necessary, rerun make_scsi_dev.

mknod /dev/sg

c 21

Examples of SCSI Robotic Control Device Files

h10c0t1l0

h10c0t2l0

h10c0t3l0

h25c0t0l0

h25c0t1l0

Configuring SCSI Robotic Control Device Paths (2.6 kernel)

Robotic control is provided by the SG driver, which includes a device file for each device

in the system. These device files have the format /dev/sgN, where N is a decimal

number from 0 to 255.

Chapter 6, Enterprise Linux 87

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Seagate ST11200N Technical Information Seite 101