Seagate ST11200N Technical Information PDF herunterladen (Seite 98)

Before You Start

Observe the following important points when performing the tasks described in this

chapter:

◆ The VERITAS support web site (http://www.support.veritas.com) contains server

platform compatibility information for a number of vendors and products (see the

NetBackup Product > Compatibility area of the site). Verify that your server platform

is supported before configuring devices.

◆ For NetBackup to recognize and communicate with connected devices and for device

discovery to discover devices, NetBackup issues SCSI pass-thru commands to the

devices in a configuration.

Device files must exist that follow the naming conventions explained in “Configuring

Robotic Controls” on page 86 and “Configuring Tape Drives” on page 88. A built-in

pass-thru driver (SG) is available.

◆ Verify that the st (tape) device driver is installed or loaded in the kernel. This driver

allows the use of SCSI tape drives.

◆ Verify that the sg device driver is installed or loaded in the kernel. This driver allows

passthru commands to SCSI tape drives and control of robotic devices.

Use the /sbin/lsmod command to display and verify that these modules are loaded

in the kernel. Example output is as follows:

Module Size Used by

sg 14844 0

st 24556 0

The standard Enterprise Linux releases have these modules available for loading.

When running Enterprise Linux, these modules are dynamically loaded as needed. It

is also possible to load these modules if they are not in the kernel. Use the following

commands:

/sbin/modprobe st

/sbin/modprobe sg

◆ For Linux distributions using the 2.4 kernel, the binary

/usr/openv/volmgr/bin/make_scsi_dev will execute during NetBackup

installation (and also at boot time). The binary does the following:

◆ Creates the directories /dev/sg and /dev/st.

◆ Obtains the device file output generated by the sg and st drivers.

◆ Creates device files for each tape device and library of the format required by

Media Manager and places them in these directories.

84 NetBackup Media Manager Device Configuration Guide for UNIX, Windows, and Linux

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Seagate ST11200N Technical Information Seite 98