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Configuring and Using Backup Devices
Shared Devices in the SAN Environment
Chapter 2 59
In order to share a device among multiple systems, configure one logical
device for each system on which you want to use the device locally.
NOTE Before the ATS component can be configured, the MC/ServiceGuard
configuration has to be completed and a cluster has to exist.
Refer to the following documents for detailed information:
• B3936-90032 Using Advanced Tape Services (MC/ServiceGuard
documentation)
• B3935-90015 MC/ServiceGuard Version A.11.05 Release Notes
• B3936-90026 Managing MC/ServiceGuard, Sixth Edition
Creating the ATS Configuration Files
Run the stquerycl command to gather the configuration of all attached
tape devices and robotic control. This will create the configuration file.
The configuration file includes the following new device file names and a
usage policy for all devices:
• dev/rmt/st#m
for tape device files
• dev/rac/sac#
for robotic control devices
The configuration files should be the same on all nodes for the same
physical device. Both the robotics and drive files should be included.
Configuring Drives
Floating Drives Drives that should be accessible from both hosts, depending on which
host the package is running, have to be configured based on the virtual
host.
Table 2-3 How to Configure a Floating Drive
Hostname node_Appl
Device Control Path /dev/rmt/st3m