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Legato NetWorker, Release 7.0
Disaster Recovery Guide
Chapter 3: UNIX Disaster Recovery
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Task 3: Configure the Devices and Test the Operating System
To configure the devices and test the operating system:
1. Configure any devices the NetWorker software requires, for example SCSI
pass-through devices for autochangers. For information about configuring
devices, refer to the Legato NetWorker Administrator’s Guide, UNIX Version.
2. Test that the:
• Name to Address resolution and TCP/IP are functioning properly.
To test these, run ping on the server to reach a client, and then run
ping on a client to reach the server.
• Operating system is functioning properly.
• Tape drive is functioning properly. To test this, run the mt
commands.
• Operating system recognizes devices. If the operating system is not
recognizing devices, you might need to:
– Load the SCSI driver.
– Install the device driver software.
– Modify the device configuration files to enable the computer to
communicate with the device during recovery. For details on
modifying the device configuration files, refer to the Legato
NetWorker Administrator’s Guide.
3. Ensure that the block size mode for tape devices used with NetWorker is
set to variable. Otherwise, data recovery may fail. The procedure for setting
the device block size varies depending on your operating system. For
example, to set the tape device block size on an AIX system:
a. Open the IBM System Management Interface Tool (SMIT) and select
the Devices box in the System Management section near the bottom
of the SMIT window.
b. Select Tape Drive.
c. Select Change/Show Characteristics of a Tape Drive. This brings up a
list of tape drives.
d. Select a tape drive from the list. The attributes of the selected tape
drive will display.
e. Ensure that the BLOCK size (0=variable length) (Num.) is set to 0.
f. Repeat step d and step e for each tape drive the NetWorker software
uses.
For information about setting the tape device block size on the operating
system, refer to the operating system documentation.